Now, it could be that he doesn't want to tour outside the US anymore at his age. Or he lost the proper paperwork to renew. Or a paperwork delay on the govt side. However, if I had to bet on who is more organized and better at telling the truth, I am going with the State Dept of the U.S. Govt over Ace Frehley.

There are only a few reasons why you can't get a passport:
Unpaid Federal Taxes
Unpaid Child Support greater than $2,500
Outstanding warrants
Probation/Parole
Convicted of sex or drug trafficking
https://travel.state.gov/content/travel ... he%20court)
Before this, has Ace toured outside the U.S. in recent years?