Thank you for noticing, this is my log https://https://smapi.io/log/d5f93b4d434f4c09afb685d5ad4f1bb0 I'm not a native English speaker don't bully me :>>
It is an error of the Custom Music mod. If I'm not mistaken, it is a kind of incompatibility with the latest version of the Generic Mod Config Menu mod, you can try to install an older version of the GMCM mod to see if it works together with Custom Music. (This error has already been reported 3 times in the bugs section on the nexus page of the Custom Music mod, and it seems that for someone worked to install an old version of GMCM). And don't worry, my native language is not English either.
