Animation Markers Help

I created a character, with a sword, that is permanently welded on, and to make the damage, and hitbox, I tried using GetMarker code, since that’s what my tutorial was using. My problem is, I’m not sure how to add markers on Moon Animator, and if I try using the normal roblox animator plugin with my “custom” rig, it says an error like this:

Try to see if all Motor6Ds are correct

I fixed it by deleting a few parts from the sword, I forgot to say that lol.