@buster123 - Glad you found a workaround.
I see from your mp3tag.txt
file (the renamed mp3tag.m3u
file) that your files are stored on a Windows style network drive: \\machine\share\path\file.mp3
Naturally, that is a use-case I did not test.
I'll need to set up such a network shared directory so I can test what happens in the code with this kind of path.