Animation Sliding [Error?]

Hello, I am a student working on some game along an tutorial but i have a weird behaviour that i can not solve on my own. I have an AnimatorController for my Zombie, which i controll in the scripts. Everything worked well unit i started working on the FPS Controller. After that the "Animation" broke and i don't know how to fix it.

I use a Statemachine for all my derived classes which handles the animations.