Problems with Microsoft Store and Unhandled Errors

Tobias Enriquez 1

Hello there,
I have been working on making a MAUI based UPNP Port Mapper using Open.NAT, and I have ran into a problem that prohibits me from releasing the app onto the Microsoft Store properly. It shows a Internal 500 Error when calling GetAllMappingsAsync, and then with a sequence of other Mapping Errors. No other piece of my program causes this, and trying to catch it does nothing, even when I directly tried to catch it in the libary source code and then recompiled it. After trying that, I just disabled the "breaking on errors" in Visual Studio and my program worked just fine! But when I compiled it all to an MSIX and sent it off to the Microsoft Store the problem reemerged, and my program just kept crashing. This only happens when installed from the Microsoft Store and never anywhere else, even from the MSIX.

Any one have suggestions? Thank you so much in advance.

Roy Li - MSFT 32,231 Reputation points Microsoft Vendor

2022-07-12T03:11:13.133+00:00

Have you checked the error log from the Event Viewer to see what is the error message for the crash?
Tobias Enriquez 1 Reputation point

2022-07-14T01:36:37.26+00:00
Whoa! That actually gives me two completely unrelated errors that make much more sense!
Since I already have started this thread, you mind helping me?
If so here they are:

System.DllNotFoundException: Unable to load DLL 'Microsoft.ui.xaml.dll' or one of its dependencies: The specified module could not be found. (0x8007007E)

Trying to find a place to store permanent non-admin and generally invisible files.
Thanks!
Roy Li - MSFT 32,231 Reputation points Microsoft Vendor

2022-07-14T09:10:51.377+00:00

Have you installed the Microsoft.UI.Xaml NuGet package manually in your app?
Tobias Enriquez 1 Reputation point

2022-07-16T04:06:36.343+00:00
After doing some poking around, I was able to fix the 2nd error, but the 1st one still remains.

MAUI is part of VS 2022 Preview, meaning that it uses WinUI 3, which should include Microsoft.UI.XAML.dll by default (which it does when in Debug) but it looks like when compiling for release, the dll is unincluded for some reason.

I have tried 2 diffrent options, none of them works:

Installing the Nuget Package: The version is too old.

Adding the dll directly: IDK why that doesn't work
Fishing around online, I found many people with the same problem. I kind of regret using MAUI.

If you have any suggestions, thank you.
If not, thank you for your time.
Roy Li - MSFT 32,231 Reputation points Microsoft Vendor

2022-07-18T09:07:26.87+00:00

I have to say that currently, we don't have much more information about this. For your scenario, I suggest that you might need to open a paid support ticket for this. Please contact our paid phone support at MS Support. You will get 1:1 support on that. Select Developer Tools / .NET / .NET 6.0 / Multi-platform App UI (.NET MAUI) on the support page and you could contact the team. Please kindly note that your support ticket will be free if it is Microsoft's issue.