Can't add a keyframe in the animation editor

So, i was rigging some custom body and i tried animating the rig but i don’t why and how, i couldn’t create a keyframe

There was some output:

builtin_AnimationClipEditor.rbxm.AnimationClipEditor.Src.Components.TimelineActions:396: attempt to call a nil value
Stack Begin
Script 'builtin_AnimationClipEditor.rbxm.AnimationClipEditor.Src.Components.TimelineActions', Line 396 - function addKeyframe
Script 'builtin_AnimationClipEditor.rbxm.AnimationClipEditor.Src.Components.TimelineActions', Line 401
Stack End

I tried animating a dummy rig via the rig builder and using another place but, same result, I can still make pose with the custom rig and the normal rig.

Note: I found a topic about the same problem but the solution didn’t work for me.

Thank’s for reading!

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