Issues with climbing ladders in a 2D platformer

Umm, I tried importing the climbing animations from that tutorial you suggested, and it says that the Mesh contains root bone as root but animation doesn’t contain the root track. I tried using the basic UE5 Mannequin as that is what I am using right now, but I get this error message. I didn’t change anything except the skeleton. Also what do you mean by set cmc to flying?