Add to Prefab not working

I'm having issues add the character to a prefab. The inworld controller is able to add, but when I drag and drop the custom character it won't stay (it briefly adds it, then deletes it and adds it to the mainscene.

Hey Jonathan,

Would you please check if the current InworldScene is correct? If you've set the current scene in Inworld Studio Panel, the InworldScene may be changed. Then your prefab not belonging to your current scene would not be able to add.

image

ok, thanks!
Jonathan