I am trying to set up some animations to work with root motion and IK. I was using the mixamo ones, which are not set up properly for root motion in games, so ran them through a blender converting tool to fix this. Previously I had to use the generic avatar because the humanoid one would bug out. Now that I want IK, i need to switch these over to a humanoid avatar. The idea that I understand is each anim should use "copy from another avatar" and that avatar under configure should be "forced into Tpose" from what Ive read online/unity learn. However, in 2019.4 the LTS I get a bunch of errors when trying to "copy from another avatar" OR "create from this model". I asked someone to give it a try , and they upgraded the project to 2020.2 and there's no errors on this version. I can even copy from another avatar like I wanted. Does anyone have any idea whats going on?? In both versions I am losing some rotation control between attack combinations, and in the 2019.4 with the bugged one , I will fall through the floor despite having bake for Y enabled.