As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN VENT DOOR OPENED AND "CABIN DOOR OPEN" CAS MESSAGE CAME ON AFTER TAKEOFF. AIRCRAFT WOULD NOT PRESSURIZE. TROUBLE SHOT TO FAULTY VENT DOOR SOLENOID. REMOVED SOLENOID AND REPLACED WITH NEW. OPERATIONAL CHECKS GOOD. MAINT IAW CC 750 MM CHPTR 52-10-07.