Hello, thank you very much for your answer!
I have now dealt with the error and unfortunately I have to announce that it still exists!
I tried it in “Debug Mode” and the error still occurs with all newly generated entries.
I also deactivated the translation plugin and then tested it.
The bug is still there!
I don’t use the import or export function …
I just use your guest book as a simple guest book …
So unfortunately I can’t tell you what the problem is and I ask for your help …
Michael from Bonn … Germany