Same issue here. Following
Hi Rodrigo,
The 'Island' SSID is broadcast by an AP that has already been provisioned on a controller network (e.g. Unleashed) and has lost connectivity with the network. Most often this is with an isolated Mesh AP.
Please see this knowledge base article for details on how to log in to the AP when it is in this state: https://support.ruckuswireless.com/articles/000011009
I hope that helps,Darrel.
You might try to login to your AP, go to "Administration :: Management" and set "None" in the bottom section "TR 069 / SNMP Management Choice".This seems to have done the trick for me.