For me, it turned out to be an issue with the xcodeproj file AND settings. I removed the DVTSourceControlAccountDefaultsKey and also recreated my Xcodeproj from scratch. If you are doing a Swift package that does not require an xcodeproj then just delete it. Very annoying problem to deal with.

Can you print a UTF8 representation of the data?

Having same issue here. They work initially and then randomly stop working. This is on Xcode 13.2 RC