As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CABIN ALT FAIL) CAS MESSAGE ILLUMINATED AT FL372. CREW DECLARED EMERGENCY TO DESCEND TO FL100. AIRCRAFT DIVERTED WITH UNEVENTFUL LANDING NAD TAXI. MAINTENANCE FOUND A LOCK FASTER GUARD DISPOSITIONED FROM PASSENGER DOOR, WHICH KEPT THE DOOR SEAL FROM PROPER SEATING. REATTACHED GUARD AND PERFORMED AN OPERATIONAL CHECK FLIGHT TO CONFIRM PRESSURIZATION SYSTEM OPERATION. OPS CHECK NORMAL.