Make sure hardware requirements are met. Another member posted to first off under protect scheme , edit scheme add + 3 argument lines -d reduced. (you can use whatever quality, this worked for me)
/Users/YOURNAME/YOURFILEDIRECTORY/"MODELNAME".usdz
/Users/YOURNAME/YOURFILEDIRECTORY/FOLDERNAME
then,
in Xcode , at line 55 change the input name to the same argument line for input folder with the pictures.
run that ******