well , I had the same error , but in my case I waited 2 hours the first time , this is normal ?
It shouldn't take that long. Once you delete a site, please wait a couple minutes for the LEDs to start alternating between green and amber. Once the APs reach this state, feel free to disconnect them and move to a different site. It would work fine with no issues.
is it the same if i want to change mesh conection to wired devices? i have two APs, the main is wire but the other is mesh state but when i try to delete the mesh device and reconnect with wire the AP only flashing with led green and ambar and the app can´t found the devices deleted