please show us the screenshots of Configuration >> Network pages of AP and SM.
Sounds like some uncommon configuration. Do you mean you can not reach the Internet from AP or SM. Or from some host connected to on of SMs?
Mate good news I found the issues. I didn’t have one SM configured with DHCP below and somehow this must have been causing a conflict as i would get a connection and then it would fail 30 seconds after.
It’s up and going strong atm. For some reason it’s not connecting to maestro but the network IS working.
Thank you so much for your help though. Seems you were all on the ball with this one.