How can I fix this animation script?

When I use this animation script only I can see the custom animation how can I fix it?

This post is a bit too long for me to read, so I skipped 90% of it.
However, here’s your issue.

If you’re trying to make animations play by localscript, then you should have the Server give you the AnimationTrack in order for everyone to see it. If you’re doing it locally without the server giving you it, then only you would see it.