As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT NR 2320 THE CREW REPORTED AN AIR/GROUND FAIL MESSAGE IN FLIGHT. THE GEAR WOULD NOT RETRACT. THE ACFT RETURNED TO CLE AND LANDED WITHOUT INCIDENT. MX INSPECTED AND REPLACED THE NOSE GEAR WOW HARNESS AND PROXIMITY SWITCH. OPS CHECKS WERE GOOD.