Getting 'unable to build chain to self-signed root for signer "".' when installing into physical device

When I run my app into my iPhone I get this Warning:

unable to build chain to self-signed root for signer "".

My application Installed in iphone but it closed suddenly.

Solution

I had the same problem and basically did like posted in the comment:

Remove my account at Xcode / Preferences at the top right.
open keychain. At the left "my certificates": Delete the Mac or iPhone etc Developer certificate.
just starting Xcode again and creating a new account like one did when starting Xcode for the first time.

The type or namespace name 'MauiWinUIApplication' does not exist in the namespace 'Microsoft.Maui'
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