Says must be connected for at least 2 hours and flex radio must be provisioned via RF profiles... Sound like you know that, so I would suggest opening a ticket as well as reconnecting the AP to dashboard for at least 2 hours post fw upgrade.
I actually think we have had it connected for more then two hours.
But I will - Re-try "the procedure" today and let you know.
Alternatively I can now see that survey mode has been enabled from IOS-XE 17.9 (or something) in "DNA-persona" - I tested that out on another 9164 yesterday and that seems to work just fine.
(For those who want to try that : SSH or console into your "DNA-persona" AP, and give it the command : ap-type site-survey)
The "webui" of the AP (who nows looks an awfully lot like the OEAP UI 🙂 ) will have the settings you need for channel and power. (The login is admin / admin when setting this "type", regardless of what you had before on the AP).