Hello! Without knowing more about how your avatar is set up, I can just offer you general advice.
First of all, make sure that the Object with the Animator Component is the root Object for the Avatar (in this case, "Kitty Cat (1)"). If it is, try triple-clicking one of those yellow Blend Shape Animations and make sure that the only contents of the text field are "Body" without the quotation marks.
If that doesn't work, you may have something wrong with your Skinned Mesh Renderer Component in your Body. This could be the case if your Blend Shape names have changed, or maybe it's something wrong with your FBX/Mesh. The simplest solution would be to reimport only Chocolat's Prefabs and FBX and make sure everything else is unchecked, otherwise you may overwrite any changes you've made. If that doesn't fix it, drag the Prefab you want to use into the Scene and copy over everything from your other Avatar. Importantly: Do not Copy-Paste Skinned Mesh Renderer Components. If you want to copy any Blend Shape edits you have made, do it manually or find and use a tool to do it for you.
Hopefully that works. If it doesn't, I may need to know a bit more about how your avatar is set up to help you more.
