Mythicmobs build 3649 very bugged

I upgraded from 4.11 to 4.12 on this newest build and I'm having loads of errors, I haven't changed my java version, here are some of the errors I am also getting errors from other plugins like PandeLoot or MME but it is due to this version All mobs aren't wearing anything and any mob that has a mythicitem bullet type is producing loads of errors when that projectile is used