Game crashes on startup with the mod. https://modrinth.com/mod/polytone

forge and fabric versions of L4J appear to be incompatible. unfortunately, @Wilyicaro mentioned in a similar ticket that it’s not possible due to a mixin issue.

hopefully we can see a patch from either polytone (ticket) or possibly through @Wilyicaro .

Fixed in version 1.6.4, thanks for reporting.