your command 'show aps' actually shows no aps. That command should show the AP itself and it is not.
I have seen this when an AP joins a cluster that is 1) not the same model of AP and 2) not the same firmware version.
It is attempting to join the cluster but cannot because of the different models/firmware.
You sure there are no other clusters on this VLAN?
OR
If there are no other IAPs on that vlan.
what version of firmware are you running? Possibly attempt an upgrade of the firmware through the CLI using the 'upgrade' commands?
also, when you log into the IAP, does it mention anything about running the CLI in a degraded state?