Animation Blend Space not working correctly

Hello! I have a big problem…
So I set up an Animation Blueprint, and a Blend Space to my new player model (witch is also the player character). It compiled smootly, nothing special, then it would just straight up run.
(And yes I set up everything correctly, from multiple tutorials, and it is just bugged.) I know the problem, it’s not receiving the inputs correctly, but what causes it? How can I fix it?
IF you have any thoughts please write them IMMEDIATELY! I need this project to be done at the end of the summer. THANK YOU!