TPAnimBP not working on custom character

I created a character on my own, rigged it, and imported it into Unreal.
To make the movement, I followed a YouTube tutorial, where he uses the standard Third Person Character animations BP as a base.
The problem is that my character walks, jumps, and moves the camera, but does not perform any animation. Just stay in the T-Pose.
What could it be?

Hi! Do you make it with retargeting? Or your character skeleton is the same as the one of Third Person Character?

as kehel18 is supposing, you need to retarget the animations of the third person abp to your skeleton.
try this on both skeleton : Using Retargeted Animations | Unreal Engine Documentation
and then right click on the original ABP, and select retarget for another skeleton.
and apply your new ABP to your character.