My Character Animation wont work.

Hello!

Im totaly new to UE5 and things like this. And im trying to use a character and animation pack i downloaded from Mixamo(its the paladin and the sword + shield anim pack). The problem i have is that the animation(walking/running) wont play when i move my character. And when i change the speed in the edit preview it works. But not when i press play and start to walk around. What could be the reason for this?