Windows app and camera stream

I need help for a strange issue on windows app.
I created a project with 4 video stream from hikvision cameras. In designer everything works, but when i open import the project in windows app on same win10 pc i have no video stream.

Any suggestion?

Try adding the camera directly to the Windows 10 app. This will attempt to access the stream & report any errors. Let me know which error you see.

You may see an authentication error if your camera uses Digest authentication. Digest authentication is broken on machines running Windows 10 2004 19041.508 or newer. This issue has already been reported to Microsoft.

https://docs.microsoft.com/en-us/answers/questions/93105/httpclienthandler-does-not-work-for-authentication.html