Help me ! Problem AI not moving

I was working on my project and I realized that my AI did not move (with the IA move to)(a week ago my script worked well and now it does not move anymore). I try many ways to solve the problem but I find nothing : I have a refenrence plugged in my pawn pin (self) and my scripts are well written. I put print string in several places to see where it was the error but everything is good. I do not change unreal engine version. (I work in blueprint) I can someone help me !

please do not create duplicate posts it makes it so people cover the same information many times and does little to help you or others with the same problem later. its fine to bump your older post but dont create new ones. as linked below you posted this same thing a day ago and a few hours ago.