Unable to add Rule Owner under User Update Rules

[Sbachu]

I am getting a blank screen under Add Rule Owner page in User Update Rules. I do have Admin: User Update Rules permission in my SAV Role

please suggest what is missing here

[rushikeshvartak]

• What sav role user have ?

[Sbachu]

This is a custom SAV Role we built and added permission 

Admin:User Update Rules

[rushikeshvartak]

Add Home Feature

[Sbachu]

Home Feature is already part of SAV Role

[rushikeshvartak]

Please check network logs to find which feature and API having issue and giving 403 error . [Sample Image Below]