Mannequin Animation not working in Retarget

Good evening, I have a small problem, I want to use the Manequin UE5 animations in the model that I downloaded using FortnitePorting, I did all the IK of the bones and when I’m doing Retarget the animations work well with the infinite loop, but when I export the UE5’s own animations, the running and walking animations don’t loop as they should, does anyone know how I can solve this? Because I did the whole process with the Fortnite Porting models for UE5 and I didn’t get this “error” and it worked perfectly.

Does anyone know how I can fix this?