Thank you! I have just coded this part in a second test-project and I found out, that the error came when I wanted to write from the extension to the main-app. This also had an effect to the reading, which was actually in a different part of the app. I don't know why, but this error only came up on the real device, not in the simulator - but now as I know the reason I was able to find a way to solve it in my code :-) BTW: 1983 my year of birth ;-)

After re-starting the Browser everything seems to be ok now - problem does not appear anymore.

Hi, that was also my question and I also did not find any tutorial on youtube. Is it already possible to create an extension with SwiftUI or isn't it supported yet? Have you found any news about it? (As this post is 1 year old)