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Voytec asked RoyLi-MSFT edited

UWP System exception error: HRESULT: 0x80040904

When updating Microsoft.UI.Xaml tp 2.6.0 I get the following designer error:

109468-a.png



Rolling back to 2.5.0 doesn't help. I need to use my BackUp project with 2.5.0 and I can\t update to 2.6.0.

When I move my project to another folder the desginer works but after compillation error comes back again...

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@Voytec-6484 Do you mean WinUI 2.6 when you mentioned. Sometimes, there are some error exceptions that occur in XAML designer, but they don’t affect the project operation. So does your project work when you run it?

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it do can compile but I can't work with the designer.
@AryaDing-MSFT

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@Voytec-6484 Since your project runs well, there are no errors in code. This issue is caused by the Xaml Designer error. My suggestion is that you could report this problem to Visual Studio(Open Visual Studio-> select Help tab in the menu->Send Feedback->Report a problem), after these, you will open a web page. Here you could describe your problem in detail and submit it. Besides, if you use WinUI 2.6, you could also report this issue to GitHub with WinUI 2.6 tag.

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