Help! Joints refuse to move in Animation Editor?

I've been so excited to make my first game in Roblox Studio, but development has come to a halt because of this one thing I can't find a solution for anywhere.

I made a rig, but when I try to animate it, the joints won't budge.

I have tested:

• Plugins
• Collision
• Anchors
• Attempted to delete welds (I deleted all the welds from the left antler that were under the part but idk if that fully deletes the welds or not)

I'm completely stumped, and I've been stuck on this problem for over a week. Please help!

VIDEO: https://www.reddit.com/r/robloxgamedev/comments/legkrx/now_joints_refuse_to_move_at_all_in_the_animation/

Use a Motor6D Plugin, or whatever it is called and then make a full body Rig out of it