Animations not playing in sequencer

Hello there,
I’m having a small problem. I did a sequence with 3 characters. Everything was working perfectly.
When I opened back my file, the animations of 2 characters are not playing and are instead showing me a T-pose.
If I try to add a new animation in the timeline of one of the 2 characters that are not working, the animation is playing fine but the rest of the animations are still frozen.

It’s probably a silly thing to correct but I am a newbie…
2022-05-03 18-32-40.mkv (11.1 MB)

I started looking around and I found out that most of my animations sources are missing and are showing me a t-pose.
That’s really weird cause when I try to reimport them they are not showing up but they do exist in the explorer folder. The only thing I noticed is that they are really low in size (around 10 Ko to 100 Ko).

I really need some help…

**EDIT : **
I found out that the source file path is broken, when i try to relink i can’t found out the animation cause it is an uasset and not an .fbx