I downloaded a 3d model from mixamo and uploaded to studio but when i try to animate it from animation editor it says : Select Rig but there is no rig on my 3d model there are just things called : “bones” and “InitialPoses” named folder and “AnimationController” named thing
If you character is a model with multiple meshes and parts, what you could do is add a part, name it HumanoidRootPart, then rig by using a rigging plugin selecting HumanoidRootPart first and then all your other parts. Rig and then you should be able to animate.
I created parts and placed them in the parts of the character. now i can choose a rig for the animation editor and it opens, but just parts move, the character does not move, I can only move the character if I click on the bones.