The mod works perfectly accept for Papa Khan, the problem with him is that he is still using vanilla model. I checked g.e.c.k and it shows his updated model. I also don't have any other mods that change Papa.

Most likely a load order issue.

Use the esp instead of the esm and move to the bottom of your load order.

I'm about to try that but I honestly don't know why I didn't try that first. It worked thank you.

If you are using YUP you will run into more issues. For future reference, open all your mods in FNVEdit and open the lowest mod affecting whatever it is you are having issues with, and it will tell you on the right hand side which files it is competing with from which mods.

Hello everyone!! Many thanks to the author for the work and for the amazing mod !!!1