error in IOS

[learsixela]

at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].Xamarin.Forms.Platform.iOS.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00000] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x00014] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildAdded (Xamarin.Forms.VisualElement view) [0x0002a] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.VisualElementPackager.Load () [0x0001e] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].SetElement (TElement element) [0x000cc] in :0 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].Xamarin.Forms.Platform.iOS.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00000] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x00014] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildAdded (Xamarin.Forms.VisualElement view) [0x0002a] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.VisualElementPackager.Load () [0x0001e] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.PageRenderer.ViewDidLoad () [0x00086] in <f321195339234cc7a2f7f1d5fa08167d>:0 at (wrapper managed-to-native) ObjCRuntime.Messaging:IntPtr_objc_msgSendSuper (intptr,intptr) at UIKit.UIViewController.get_View () [0x00030] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/build/ios/native/UIKit/UIViewController.g.cs:2983 at Xamarin.Forms.Platform.iOS.PageRenderer.get_NativeView () [0x00008] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.PageRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x0004f] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x00014] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.NavigationRenderer.CreateViewControllerForPage (Xamarin.Forms.Page page) [0x00008] in <f321195339234cc7a2f7f1d5fa08167d>:0 at Xamarin.Forms.Platform.iOS.NavigationRenderer+<OnPushAsync>d__45.MoveNext () [0x00016] in <f321195339234cc7a2f7f1d5fa08167d>:0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 at System.Runtime.CompilerServices.TaskAwaiter1[TResult].GetResult () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357 at Xamarin.Forms.Platform.iOS.NavigationRenderer+<b40_0>d.MoveNext () [0x00067] in :0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:152 at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.b__6_0 (System.Object state) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.6.1.2/src/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1018 at UIKit.UIKitSynchronizationContext+cAnonStorey0.<>m__0 () [0x00000] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/UIKit/UIKitSynchronizationContext.cs:24 at Foundation.NSAsyncActionDispatcher.Apply () [0x00000] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/Foundation/NSAction.cs:163 --- End of stack trace from previous location where exception was thrown --- at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/UIKit/UIApplication.cs:79 at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/UIKit/UIApplication.cs:63 at TestAppButtonCircle.iOS.Application.Main (System.String[] args) [0x00001] in /Volumes/Disco D/DescargasD/ButtonCirclePlugin-master/test/TestAppButtonCircle/TestAppButtonCircle.iOS/Main.cs:17

[jd-alexander]

Got an error similar to this on iOS. had to remove the library.

System.ArgumentNullException: Value cannot be null. Parameter name: value at UIKit.UIButton.set_Font (UIKit.UIFont value) [0x00011] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/build/ios/native/UIKit/UIButton.g.cs:759 at ButtonCircle.FormsPlugin.iOS.ButtonCircleRenderer.OnElementChanged (Xamarin.Forms.Platform.iOS.ElementChangedEventArgs1[TElement] e) [0x00091] in <019ef9ea9d5345738e9a61978d0e1f83>:0 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].SetElement (TElement element) [0x00110] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementRenderer.cs:167 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].Xamarin.Forms.Platform.iOS.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementRenderer.cs:116 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x0001b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Platform.cs:192 at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildAdded (Xamarin.Forms.VisualElement view) [0x00009] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:63 at Xamarin.Forms.Platform.iOS.VisualElementPackager.Load () [0x0001e] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:36 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].SetElement (TElement element) [0x000cc] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementRenderer.cs:155 at Xamarin.Forms.Platform.iOS.VisualElementRenderer1[TElement].Xamarin.Forms.Platform.iOS.IVisualElementRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementRenderer.cs:116 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x0001b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Platform.cs:192 at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildAdded (Xamarin.Forms.VisualElement view) [0x00009] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:63 at Xamarin.Forms.Platform.iOS.VisualElementPackager.Load () [0x0001e] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:36 at Xamarin.Forms.Platform.iOS.PageRenderer.ViewDidLoad () [0x00086] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\PageRenderer.cs:105 at at (wrapper managed-to-native) ObjCRuntime.Messaging:IntPtr_objc_msgSendSuper (intptr,intptr) at UIKit.UIViewController.get_View () [0x00030] in /Users/builder/data/lanes/5665/6857dfcc/source/xamarin-macios/src/build/ios/native/UIKit/UIViewController.g.cs:2983 at Xamarin.Forms.Platform.iOS.PageRenderer.get_NativeView () [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\PageRenderer.cs:40 at Xamarin.Forms.Platform.iOS.PageRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x0004f] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\PageRenderer.cs:55 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x0001b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Platform.cs:192 at Xamarin.Forms.Platform.iOS.TabbedRenderer.SetupPage (Xamarin.Forms.Page page, System.Int32 index) [0x0000a] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\TabbedRenderer.cs:284 at Xamarin.Forms.Platform.iOS.TabbedRenderer.Reset () [0x0001c] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\TabbedRenderer.cs:261 at Xamarin.Forms.Internals.NotifyCollectionChangedEventArgsExtensions.Apply (System.Collections.Specialized.NotifyCollectionChangedEventArgs self, System.Action3[T1,T2,T3] insert, System.Action`2[T1,T2] removeAt, System.Action reset) [0x001e1] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Core\Internals\NotifyCollectionChangedEventArgsExtensions.cs:77 at Xamarin.Forms.Platform.iOS.TabbedRenderer.OnPagesChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00000] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\TabbedRenderer.cs:199 at Xamarin.Forms.Platform.iOS.TabbedRenderer.SetElement (Xamarin.Forms.VisualElement element) [0x0005b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\TabbedRenderer.cs:66 at Xamarin.Forms.Platform.iOS.Platform.CreateRenderer (Xamarin.Forms.VisualElement element) [0x0001b] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Platform.cs:192 at Xamarin.Forms.Platform.iOS.NavigationRenderer.CreateViewControllerForPage (Xamarin.Forms.Page page) [0x00021] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\NavigationRenderer.cs:340 at Xamarin.Forms.Platform.iOS.NavigationRenderer+d__44.MoveNext () [0x0000a] in C:\BuildAgent3\work\ca3766cfc22354a1\Xamarin.Forms.Platform.iOS\Renderers\NavigationRenderer.cs:327

[wilsonvargas]

Have you tried to add a key to your Info.plist file? If you have not done that add this key to the file like this:

<key>UIAppFonts</key>
    <array>
      <string>MaterialIcons-Regular.ttf</string>
    </array>