Copilot app chrashes

Marko Stupar 25 Reputation points
2025-09-03T12:19:56.98+00:00

winApp copilot crashes on launch.

[eventLog]

Faulting application name: Copilot.exe, version: 1.25083.149.0, time stamp: 0x67ab0000

Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000

Exception code: 0x80131623

Fault offset: 0x00007ff85f602dae

Faulting process id: 0x0x1568

Faulting application start time: 0x0x1DC1CCAB5DC0B25

Faulting application path: C:\Program Files\WindowsApps\Microsoft.Copilot_1.25083.149.0_x64__8wekyb3d8bbwe\Copilot.exe

Faulting module path: unknown

Report Id: ef3a7efe-8ed9-49d9-b403-bfe8e2463bf1

Faulting package full name: Microsoft.Copilot_1.25083.149.0_x64__8wekyb3d8bbwe

Faulting package-relative application ID: App

[eventLog]

Application: Copilot.exe

CoreCLR Version: 9.0.325.11113

.NET Version: 9.0.3

Description: The application requested process termination through System.Environment.FailFast.

Message: Task Faulted at File: UXHostApplication.cs Method: OnLaunched Line: 73

Description: The process was terminated due to an unhandled exception.System.Runtime.InteropServices.COMException (0x803E0105): The notification platform is unavailable.

The notification platform is unavailable.

at WinRT.ExceptionHelpers.<ThrowExceptionForHR>g__Throw|38_0(Int32 hr)

at WinRT.ExceptionHelpers.ThrowExceptionForHR(Int32 hr)

at ABI.Microsoft.Windows.PushNotifications.IPushNotificationManagerMethods.Register(IObjectReference _obj)

at Microsoft.Windows.PushNotifications.PushNotificationManager.Register()

at CopilotNative.Notifications.Manager.PushNotificationManager.Register()

at CopilotNative.Core.UX.UXHostApplication.OnLaunchedAsync(DateTimeOffset startTimeUtc, CancellationToken token)

at CopilotNative.Core.UX.UXHostApplication.OnLaunchedAsync(DateTimeOffset startTimeUtc, CancellationToken token)

Stack:

at System.Environment.FailFast(System.Runtime.CompilerServices.StackCrawlMarkHandle, System.String, System.Runtime.CompilerServices.ObjectHandleOnStack, System.String)

at System.Environment.FailFast(System.Threading.StackCrawlMark ByRef, System.String, System.Exception, System.String)

at System.Environment.FailFast(System.String, System.Exception)

at CopilotNative.Core.Utilities.Extensions.TaskExtensions+<>c__DisplayClass5_0.<HandleTaskContinueWith>b__0(System.Threading.Tasks.Task)

at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef, System.Threading.Thread)

at System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(System.Threading.Tasks.Task, Boolean)

at System.Threading.Tasks.TaskScheduler.TryRunInline(System.Threading.Tasks.Task, Boolean)

at System.Threading.Tasks.TaskContinuation.InlineIfPossibleOrElseQueue(System.Threading.Tasks.Task, Boolean)

at System.Threading.Tasks.ContinueWithTaskContinuation.Run(System.Threading.Tasks.Task, Boolean)

at System.Threading.Tasks.Task.RunContinuations(System.Object)

at System.Threading.Tasks.Task.FinishSlow(Boolean)

at System.Threading.Tasks.Task.TrySetException(System.Object)

at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].SetException(System.Exception, System.Threading.Tasks.Task1<System.Threading.Tasks.VoidTaskResult> ByRef)

at CopilotNative.Core.UX.UXHostApplication+<OnLaunchedAsync>d__12.MoveNext()

at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[CopilotNative.Core.UX.UXHostApplication+<OnLaunchedAsync>d__12, CopilotNative.Core.UX, Version=1.25083.149.0, Culture=neutral, PublicKeyToken=null]].ExecutionContextCallback(System.Object)

at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[CopilotNative.Core.UX.UXHostApplication+<OnLaunchedAsync>d__12, CopilotNative.Core.UX, Version=1.25083.149.0, Culture=neutral, PublicKeyToken=null]].MoveNext(System.Threading.Thread)

at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1+AsyncStateMachineBox1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=9.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[CopilotNative.Core.UX.UXHostApplication+<OnLaunchedAsync>d__12, CopilotNative.Core.UX, Version=1.25083.149.0, Culture=neutral, PublicKeyToken=null]].MoveNext()

at CopilotNative.Core.UX.DispatcherQueueSynchronizationContext+<>c__DisplayClass2_0.<Post>b__0(System.Object)

at CopilotNative.Core.UX.DispatcherQueueSynchronizationContext+Invoker.InvokeCore()

at CopilotNative.Core.UX.DispatcherQueueSynchronizationContext+Invoker.InvokeInContext(System.Object)

at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

at CopilotNative.Core.UX.DispatcherQueueSynchronizationContext+Invoker.Invoke()

at ABI.Microsoft.UI.Dispatching.DispatcherQueueHandler.Do_Abi_Invoke(IntPtr)

at ABI.Microsoft.UI.Xaml.IApplicationStaticsMethods.Start(WinRT.IObjectReference, Microsoft.UI.Xaml.ApplicationInitializationCallback)

at Microsoft.UI.Xaml.Application.Start(Microsoft.UI.Xaml.ApplicationInitializationCallback)

at CopilotNative.Core.UX.Extensions.IHostExtensions.RunApplication(Microsoft.Extensions.Hosting.IHost, System.Func`1<CopilotNative.Core.UX.UXHostApplication>)

at CopilotNative.Program.Main(System.String[])

Microsoft Copilot | Windows Copilot | App
0 comments
Answer accepted by question author
Haytham-C 5,630 Reputation points Microsoft External Staff Moderator
2025-09-04T09:08:08.85+00:00

Hello @Marko Stupar

Thank you for reaching out to Microsoft Q&A and informed us about the issue.Based on the event log I believed that the main error is from System.Runtime.InteropServices.COMException (0x803E0105): The notification platform is unavailable. This indicates Copilot is not able to register push notification so the session can't start. To tackle with this issue, please follow these steps:

1. Repair/Reset Copilot: 

  • Open settings > Installed apps > Copilot > Advanced options > Repair (If the issue still persists, then click Reset)

2. Restart Notification service:

  • Open Run dialogue (Windows + R) > input services.msc > Enter 
  • Look for Windows Push Notifications System Service > Right-click > Properties > set Startup type to Automatic
  • If service status is pause, click start. 

3.Run a System File Check:

  • Open Command Prompt and Run as Administrator then input this command one by one:
    • sfc /scannow > Enter
    • DISM /Online /Cleanup-Image /RestoreHealth > Enter (Do notice the space between the forward dash (/) in the command)
  • Restart your PC

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".  

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. 

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  1. Marko Stupar 25 Reputation points
    2025-09-04T14:22:23.98+00:00

    Thank you for answer.

    I thought that question was not sent, because of redirection to page that shows that content has been deleted and mentioning of code of conduct.

    Because of that we tried to find solution on our own and found that it is similar as mentioned by @Haytham-C .

    The cause was usage of the utility tool wpd 1.5.2042, and disabling "windows push notifications user service". Turning it back on resolved the issue.

    untitled

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