Please help! How to get aim offset to work

Okay, for the last 3 days I have tried and tried to get aim offset to work. Everything is working, there is no errors, I did everything correctly, but on my third person character (using Animation Starter Pack) it simply wont animate my character looking up and down, it simply just floats upwards and downwards. It is annoying me because I have been trying to fix this for 3 days but it wont work, I have done everything every video and tutorial told me to do, I can rotate pitch, but the Aim Offset animation is not playing when I move my mouse up and down, it is just floating up and down! Please help!!

Hello, what is floating exactly? or can you make a video or gif?