As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED TOILET SMOKE CAUTION MESSAGE AND HAZE IN CABIN IN FLIGHT. CREW DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED LAV WASTE COMPARTMENT AND PERFORMED CHECKS ON LAV SMOKE DETECTOR, AIR CONDITIONING SYSTEM AND CABIN LIGHTS USING AIRCRAFT MAINTENANCE MANUALS. NO DEFECT NOTED. UNABLE TO DUPLICATE FAULT. AIRCRAFT RELEASED FOR SERVICE.