c# - Xamarin Studio / VS for Mac Storyboard not opening -

i bought new macbook pro developing ios universal app. before have sold old one, pushed code bitbucket repository.

now have installed vs mac , xamarin studio , pulled source code bitbucket. working fine (building, debugging, etc.) designing in storyboard designer wont work.

i getting following exception:

    [2017-07-25 15:55:16.3] error: ensuresession (counter 1): monotouch.design.client.designerremoteexception: system.notsupportedexception: not parse xml     @ monotouch.design.parser.parse (monotouch.design.parsecontext context) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:220     @ monotouch.design.uikitparser.parse (monotouch.design.parsecontext context) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:205     @ monotouch.design.server.sessioncontroller.loadxmlcore (monotouch.design.parsecontext ctx) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:332     @ monotouch.design.server.sessioncontroller.loadxml (system.xml.linq.xelement xml, system.boolean freezemisplacements, system.string[] viewstohide) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:304     @ monotouch.design.server.sessioncontroller.loadfullxml (system.xml.linq.xelement xml, system.boolean freezemisplacements, system.string[] viewstohide) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:208     @ monotouch.design.server.commandlistener.loadxml (monotouch.design.commandrequest untypedrequest, monotouch.design.server.sessioncontroller controller) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/commandlistener.cs:207     @ monotouch.design.server.router.route (monotouch.design.sessioncommandrequest request, monotouch.design.server.sessioncontroller controller) in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/router.cs:49     @ monotouch.design.server.commandlistener+<handlerequestasync>c__async1.movenext () in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/commandlistener.cs:99   @ monotouch.design.client.serverprocessconnection.sendrequest (monotouch.design.commandrequest req, system.boolean throwifnotrunning) [0x00059] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/connection/serverprocessconnection.cs:234    @ monotouch.design.client.serverprocessconnection.sendrequest[tresponse] (monotouch.design.commandrequest req, system.boolean throwifnotrunning) [0x00000] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/connection/serverprocessconnection.cs:243    @ monotouch.design.client.serverprocessconnection.postxml (monotouch.design.designsession session, system.string xml, system.string[] viewstohide) [0x00014] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/connection/serverprocessconnection.cs:186    @ monotouch.design.client.serverprocessconnection.postxml (monotouch.design.designsession session, system.xml.linq.xelement fullstoryboard, system.xml.linq.xelement[] partialelements, system.boolean freezemisplacements, system.string[] viewstohide) [0x000c0] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/connection/serverprocessconnection.cs:165    @ monotouch.design.client.iphonedesignersession+<renderxmlwithpartialreloadretry>c__async4+<renderxmlwithpartialreloadretry>c__anonstorey16.<>m__0 (monotouch.design.client.serverprocessconnection c) [0x00000] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/iphonedesignersession.cs:652    @ monotouch.design.client.iphonedesignersession+<ensuresession>c__anonstorey3b`1[tresult].<>m__0 () [0x0012d] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.client/iphonedesignersession.cs:1989  

according exception xml (storyboard) invalid , not parsed. somehow able open storyboard on old macbook (6 months ago). possible open storyboard through xcode interface builder.

errors happening in detail:

    com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.310 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.storyboard.usetraitcollections  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.310 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.storyboard.colormatched  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.310 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.storyboard.device  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.312 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.proxiedpageviewcontroller.storyboardidentifier  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.313 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.proxiedviewcontroller.storyboardidentifier  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.317 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not find monotouch.design.proxiedlabel.usesattributedtext  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.325 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: not parse uicolor specified following data: '<color key="nscolor" white="1" alpha="1" colorspace="custom" customcolorspace="genericgamma22graycolorspace" />'  com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.331 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: error in type parser for: uikit.uifont system.notimplementedexception: <font key="nsfont" metafont="system" size="200" />   @ microsoft.scripting.interpreter.methodinfocallinstruction.invokeworker (system.object[] args) [0x00024] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:263    @ microsoft.scripting.interpreter.methodinfocallinstruction.invoke (system.object[] args) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:239    @ microsoft.scripting.interpreter.methodinfocallinstruction.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0003b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:289    @ microsoft.scripting.interpreter.interpreter.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0001b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/interpreter.cs:126   com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.331 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: error in type parser for: {0} system.notimplementedexception: <font key="nsfont" metafont="system" size="200" />   @ microsoft.scripting.interpreter.methodinfocallinstruction.invokeworker (system.object[] args) [0x00024] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:263    @ microsoft.scripting.interpreter.methodinfocallinstruction.invoke (system.object[] args) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:239    @ microsoft.scripting.interpreter.methodinfocallinstruction.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0003b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:289    @ microsoft.scripting.interpreter.interpreter.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0001b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/interpreter.cs:126   com.xamarin.mthosting.aa6984471.stderr: 2017-07-25 15:55:16.336 monotouchdesignserverunified[2229:79606] [2017-07-25 15:55:16.3] error: unhandled exception: system.notsupportedexception: not parse xml ---> system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.reflection.targetinvocationexception: exception has been thrown target of invocation. ---> system.notimplementedexception: <font key="nsfont" metafont="system" size="200" />   @ microsoft.scripting.interpreter.methodinfocallinstruction.invokeworker (system.object[] args) [0x00024] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:263    @ microsoft.scripting.interpreter.methodinfocallinstruction.invoke (system.object[] args) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:239    @ microsoft.scripting.interpreter.methodinfocallinstruction.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0003b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/instructions/callinstruction.cs:289    @ microsoft.scripting.interpreter.interpreter.run (microsoft.scripting.interpreter.interpretedframe frame) [0x0001b] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/dlr/runtime/microsoft.dynamic/interpreter/interpreter.cs:126     --- end of inner exception stack trace ---   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00050] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:313    @ system.reflection.methodbase.invoke (system.object obj, system.object[] parameters) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229    @ monotouch.design.parser.parseelements (monotouch.design.parsecontext context, system.object result) [0x000ff] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:312    @ monotouch.design.parser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0002c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:267    @ monotouch.design.uikitparser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0000b] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1392    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context, system.object result, xamarin.designer.proxiedexception error) [0x00114] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:358    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context) [0x0005a] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:240    @ monotouch.design.parser.parseelement (system.object result, monotouch.design.parsecontext context) [0x00088] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:1061    @ (wrapper managed-to-native) system.reflection.monomethod:internalinvoke (system.reflection.monomethod,object,object[],system.exception&)   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00038] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:305     --- end of inner exception stack trace ---   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00050] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:313    @ system.reflection.methodbase.invoke (system.object obj, system.object[] parameters) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229    @ monotouch.design.parser.parseelements (monotouch.design.parsecontext context, system.object result) [0x000ff] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:312    @ monotouch.design.parser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0002c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:267    @ monotouch.design.uikitparser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0000b] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1392    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context, system.object result, xamarin.designer.proxiedexception error) [0x00114] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:358    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context) [0x0005a] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:240    @ monotouch.design.parser.parseelement (monotouch.design.proxiedview model, monotouch.design.parsecontext context) [0x00048] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:779    @ monotouch.design.uikitparser.parseelement (monotouch.design.proxiedview model, monotouch.design.parsecontext context) [0x00004] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:2014    @ (wrapper managed-to-native) system.reflection.monomethod:internalinvoke (system.reflection.monomethod,object,object[],system.exception&)   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00038] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:305     --- end of inner exception stack trace ---   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00050] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:313    @ system.reflection.methodbase.invoke (system.object obj, system.object[] parameters) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229    @ monotouch.design.parser.parseelements (monotouch.design.parsecontext context, system.object result) [0x000ff] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:312    @ monotouch.design.parser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0002c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:267    @ monotouch.design.uikitparser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0000b] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1392    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context, system.object result, xamarin.designer.proxiedexception error) [0x00114] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:358    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context) [0x0005a] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:240    @ monotouch.design.parser.parseelement (monotouch.design.proxiedviewcontroller model, monotouch.design.parsecontext context) [0x000d4] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:735    @ monotouch.design.uikitparser.parseelement (monotouch.design.proxiedviewcontroller model, monotouch.design.parsecontext context) [0x00054] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1882    @ (wrapper managed-to-native) system.reflection.monomethod:internalinvoke (system.reflection.monomethod,object,object[],system.exception&)   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00038] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:305     --- end of inner exception stack trace ---   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00050] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:313    @ system.reflection.methodbase.invoke (system.object obj, system.object[] parameters) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229    @ monotouch.design.parser.parseelements (monotouch.design.parsecontext context, system.object result) [0x000ff] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:312    @ monotouch.design.parser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0002c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:267    @ monotouch.design.uikitparser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0000b] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1392    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context, system.object result, xamarin.designer.proxiedexception error) [0x00114] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:358    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context) [0x0005a] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:240    @ monotouch.design.parser.parseelement (monotouch.design.scene scene, monotouch.design.parsecontext context) [0x0009f] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:677    @ (wrapper managed-to-native) system.reflection.monomethod:internalinvoke (system.reflection.monomethod,object,object[],system.exception&)   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00038] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:305     --- end of inner exception stack trace ---   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00050] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:313    @ system.reflection.methodbase.invoke (system.object obj, system.object[] parameters) [0x00000] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229    @ monotouch.design.parser.parseelements (monotouch.design.parsecontext context, system.object result) [0x000ff] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:312    @ monotouch.design.parser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0002c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:267    @ monotouch.design.uikitparser.parseelementsandattributes (monotouch.design.parsecontext context, system.object result) [0x0000b] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1392    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context, system.object result, xamarin.designer.proxiedexception error) [0x00114] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:358    @ monotouch.design.parser.parsecore (monotouch.design.parsecontext context) [0x0005a] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:240    @ monotouch.design.parser.parseelement (monotouch.design.storyboard sb, monotouch.design.parsecontext context) [0x0004c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:856    @ monotouch.design.uikitparser.parseelement (monotouch.design.storyboard sb, monotouch.design.parsecontext context) [0x00004] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:1584    @ (wrapper managed-to-native) system.reflection.monomethod:internalinvoke (system.reflection.monomethod,object,object[],system.exception&)   @ system.reflection.monomethod.invoke (system.object obj, system.reflection.bindingflags invokeattr, system.reflection.binder binder, system.object[] parameters, system.globalization.cultureinfo culture) [0x00038] in /users/builder/data/lanes/1381/d2cbd993/source/xamarin-macios/_ios-build/library/frameworks/xamarin.ios.framework/versions/git/src/mono/mcs/class/corlib/system.reflection/monomethod.cs:305     --- end of inner exception stack trace ---   @ monotouch.design.parser.parse (monotouch.design.parsecontext context) [0x00035] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.shared/parser.cs:220    @ monotouch.design.uikitparser.parse (monotouch.design.parsecontext context) [0x00013] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/typesystem/loader.cs:205    @ monotouch.design.server.sessioncontroller.loadxmlcore (monotouch.design.parsecontext ctx) [0x00019] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:332    @ monotouch.design.server.sessioncontroller.loadxml (system.xml.linq.xelement xml, system.boolean freezemisplacements, system.string[] viewstohide) [0x0004d] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:304    @ monotouch.design.server.sessioncontroller.loadfullxml (system.xml.linq.xelement xml, system.boolean freezemisplacements, system.string[] viewstohide) [0x0000c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/sessioncontroller.cs:208    @ monotouch.design.server.commandlistener.loadxml (monotouch.design.commandrequest untypedrequest, monotouch.design.server.sessioncontroller controller) [0x001c6] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/commandlistener.cs:207    @ monotouch.design.server.router.route (monotouch.design.sessioncommandrequest request, monotouch.design.server.sessioncontroller controller) [0x0001c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/router.cs:49    @ monotouch.design.server.commandlistener+<handlerequestasync>c__async1.movenext () [0x0011c] in /users/builder/data/lanes/4470/6c2f6737/source/md-addins/xamarin.designer.ios/monotouch.design.server/connection/commandlistener.cs:99  

any suggestions how fix this? dont want start redesigning app.

thanks!

the issue xcode interface builder adds additional attribute called 'device' specifies initial device setup. open .xib using source code editor , remove 'device' attribute , should work fine.

read more - bug 58804