Mod Link occurred on zombie_players-1.12.1-1.2.7.jar

2 main things:

• Whatever method used for the mob's texture gets corrupted when possessing the zombie player mob, it looks more like when a wrong texture is applied to something.
• Shortly after possessing the mob the game will crash with a nullpointer exception while saving the NBT entity data.

crash-2019-04-20_22.22.42-server.txt

Probably fixed in Requiem, although Zombie Players is not available to test.