[MYTICMOBS] Mods compatibility

I have a Mods and Plugins server, using the jar in the latest version (1.19.3) of ArcLight. And this plugin (MythicMobs), and ModelEngine, give me errors.

And they are the only plugins that give me errors. The rest work great. MythicMobs and ModelEngine are perfect plugins to add something RPG to the game, and together with mods it would be more than perfect. I don't understand why they should be incompatible, or simply the error is something else.

Attached image and log.

LOG: https://pastebin.com/yKsw4NFA