Windows 11 updated to 26220.8138 - Emby app wont open - Application Error / .NET Runtime

[Sulphy 1]

Ok, so my Windows 11 updated this morning, and now Emby wont open. (Windows 11 Pro 25H2 - 26220.8138)

Tried uninstalling, reboot, re-install multiple times.. same issue persists. Tried opening the app multiple times, rebooted multiple times. 

Was working before the update to Windows 11 - 8138.

Emby Server version: 4.9.3.0 - Server is working fine - (Windows Server 2025 Std 24H2 - 26100.32522)

 

Event 1000 - Application Error:
Faulting application name: Emby.Client.WinUI.exe, version: 2.234.0.0, time stamp: 0x670d0000
Faulting module name: KERNELBASE.dll, version: 10.0.26100.8134, time stamp: 0x6ef2d36c
Exception code: 0xe0434352
Fault offset: 0x00000000000c717a
Faulting process id: 0x26B4
Faulting application start time: 0x1DCC0EF02E03403
Faulting application path: C:\Program Files\WindowsApps\EmbyMedia.EmbyTheater_2.234.2.0_x64__svmepx4c03f7m\Emby.Client.WinUI.exe
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report Id: e496b64a-85be-48ff-aacc-831ca29e35b2
Faulting package full name: EmbyMedia.EmbyTheater_2.234.2.0_x64__svmepx4c03f7m
Faulting package-relative application ID: App

 

Event 1026 - .NET Runtime:
Application: Emby.Client.WinUI.exe
CoreCLR Version: 6.0.3624.51421
.NET Version: 6.0.36
Description: The process was terminated due to an unhandled exception.
Exception Info: 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 Emby.Client.Application.WinUI.Services.Push.PushReceiverWinUI.StaticInit()
   at Emby.Client.WinUI.Program.Main(String[] args)
 

Any idea's? 

Much appreciated... thank you!

[Luke 42245]

HI, we'll take a look at it. Thanks for reporting.

[butterkitty 1]

I actually was able to fix this on mine by going into Windows Update -> Advanced Options -> Recovery -> Reinstall Now

It took a bit, but it reinstalled 25H2 and now it works. I did reset the emby app completely before i did, but I think that's unrelated. I have a feeling that Microsoft broke the Windows Push Service with this past update and the repair fixes it.

I could be wrong tho

[Sulphy 1]

Good call, didnt think to try that.

So, did a re-install, and same issue still! Am going to try roll-back to a previous build of windows, and see where we are at then!

[Sulphy 1]

Good call, didnt think to try that.

So, did a re-install, and same issue still! Am going to try roll-back to a previous build of windows, and see where we are at then!

Edit: Dangit!!!! Because i did a re-install... cant roll back to a previous build! Will have to look at doing a full re-install of Window.. will have to be this weekend tho!
In the meantime, if there is anything else i can provide @Luke.. please do let me know!

Thanks all...   

[softworkz 5133]

On 3/31/2026 at 11:29 AM, Sulphy said:

Ok, so my Windows 11 updated this morning, and now Emby wont open. (Windows 11 Pro 25H2 - 26220.8138)

Tried uninstalling, reboot, re-install multiple times.. same issue persists. Tried opening the app multiple times, rebooted multiple times. 

This is a Windows Insider Preview version. When you are running these, errors like the one you are seeing must be expected. It's not an Emby issue.

[RanmaCanada 502]

Edition    Windows 11 Pro
Version    25H2
Installed on    ‎2025-‎02-‎26
OS build    26200.8037
Experience    Windows Feature Experience Pack 1000.26100.300.0

Same problem here. Emby Theatre just loads to a black screen and hangs.