I have absolutly no idea why this not work.
For everyone who cant german: it says:
"Keyboard A is down Player Simulate Platformer pressing left"
and the same for D
I also tried to turn off Default controls in the behaviour. I tried a few couple other things too like use different methods with booleans or "if platformer is NOT moving" etc. all in different combinations and it still does not work. Please help I don't know what I can do else.