EDIT: Turns out the problem is with the whole inventory system and not GMusic itself
Server Version: Paper 1.16.5 472

I was using GMusic on my server with no problems, but after i ran the command below GMusic simply stopped working.

/tomap insert_doge_image_link.png resize-stretched 3 3

None of the musics would play and the first 3x3 slots of the GUI would turn into the map that i just created.
Problem persisted until total server restart.

No errors, GMusic just stops working

Hello, do you have an error in the console? Does the IoM command throw an error?

Turns out the problem is with the whole inventory system and not GMusic itself, i'm updating the report

Maybe the last update of IoM has solved part of your issue. I fixed an inventory bug that may be related to this issue

Feel free to reopen if this is still a problem with ImageOnMap 4.1.1+.