@jimmyc12322
I was getting the same issue as you and this solved it:
Per Cid's post on on future ROM set versions being unsupported... I guessed that PAST ROM sets also do not work upon update. Sure enough, I just re-extracted the zip, and updated NOTHING in the "options" tab. Everything else working now.
Hope this helps!
Also: To Jason & the team... amazing front end. Thank you. You've won another convert!