No problem: btw, the workaround is here, I have not tried it yet, but will soon.
https://github.com/livecd-tools/livecd-tools/issues/258#issuecomment-1402...
IN case anyone is interested, the error or whatever appears to have been introduced with
the update to 30.0 in python3-imgcreate. Copying the 27.9 version of fs.py to the current
fs.py from 31.0 makes the issue go away and a LiveCD is created.
Best wishes,
Ranjan