Console Throws a "Could not pass LoadWorldEvent$Impl" on Mystcraft world creation

[Chronic-Reflexes]

Error in full: https://gist.github.com/partridge420x/392fa535d4757278c8ef93bca5960edd

Server info Diagnostics: https://gist.github.com/partridge420x/6ccd76264c4bb29bf7a205b42f130e0d

I've also reported the issue to Nucleus. Just thought it would be a good idea to let both parties know