My mod, which includes the PlayerAnimator plugin, crashes upon startup.

Hello! I am currently working on a mod, and in the MCreator editor it works! However, after compiling it, and opening the Jar in forge, i Get this error:

Error loading mods

1 error has occured during loading

ModName: ModName has failed to load correctly

java.lang.NoClassDefFoundError: dev/kosmx/playerAnim/api/layered/IAnimation

The plugins used in my mod are GeckoLib and Player Animator, that's it. Any help figuring this out would be appreciated!