CustomRig animations not replicating as supposed

This is a project I made years ago Animations aren’t showing to other players, did not finish cuz I got bored with it, and recently I picked it back up again thinking of doing a revamp version, but funny enough. I re-encountered the SAME PROBLEM.

[FIXED OLD PLACE] https://gyazo.com/261c34d0e5e66f31cc52bb0dca4acf87 ; https://gyazo.com/61b40a4966df321e4835ad228c1a6840

I’ve tested multiple times, using my old script on the new game, using my new script on the new game, things remained the same, old place running fine, new place being bugged, at this point I’m really thinking this is a bug, if anyone can prove or disprove this idea, please let me know.

[NEW PLACE] https://gyazo.com/907fe2445067335e8bb92075020f54fb