https://bytebin.lucko.me/IsbgdRLntd

First of all, please use the issue template next time.

Furthermore please upgrade to this version and confirm that the bug still exists.

https://www.curseforge.com/minecraft/mc-mods/music-player/files/3739672

Do not use the -dev version. Use the normal one: https://www.curseforge.com/minecraft/mc-mods/music-player/files/3739672

unfortunately the newer version seems to have made the issue worse with the game crashing when i try to launch it

https://pastebin.com/g7rhAsat

now the original problem is back
https://bytebin.lucko.me/TbKr0VOJDh

Alright thanks. Do you have added any playlists with songs? If so can you please share the playlist.json.gz file here.
You can find the file here: %appdata%\mc-u-team\musicplayer