Please follow below.
1- SSH into the APs which are showing as disconnected or upgrade required.
2- Run the command "set factory
" followed by "reboot
3- Now without much delay, quickly delete the entry of this AP from Unleashed master AP GUI.
4- Wait for AP to boot up and wait for it to automatically join master AP. If it do not joins automatically, SSH into it with default credentials (super/sp-admin) and run command "set director ip xxx.xxx.xxx.xxx" where x.x.x.x is master AP's IP address.
Follow this for all the APs which are showing disconnected or Upgrade required.
Another very important thing to check, make sure IP configuration on all the APs is configured correctly (correct subnet, correct gateway).
To review the IP configuration of AP from CLI, run below command.get ipaddr wan
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