if you meant to say like loading forever here is my tutorial :
if your character is r15, make sure to make it r6.
First, make sure the game is published, then go to the "avatar" tab on top, click on the small "settings" button and then in the menu that appears, in the left side, click on the before last one (2 squares that are rotated aka keyframes) and you might need to scroll but there should be something to change rig (players) type (player's choice/R15/R6).
If you did those steps correctly, it should be r6 and should be working. Enjoy modding!
If it still didn't work or you cannot follow steps/get lost, watch a youtube tutorial
