MythicMobs error occuring on any commands execution

It looks like this error is caused by the plugin not loading properly.

Your incomplete log means I'm unable to say whether that's true or not, but only as a guess.

I will also say, that forge or other modded entities are generally not supported. MythicMobs is a paper plugin and usually doesn't work on modded servers. And if you do get it to work, we generally won't provide help due to the nature of modded servers taking out a lot of things that mythic needs to work properly.

Provide a full latest.log for your server for me or someone else to verify your problem. Thanks!