AP can't contact NCC

My AP NWA50AX which is only a few months old, purchased from Amazon has stopped being able to contact NCC, was working perfectly until I now I just get a blinking orange/green at 1s intervals.

I've tried:

Several new cables (both preterm & self term)

Putting the AP in dmz bypassing pfsense fw

Full reset with the reset button

Remove and reconnect to nebula app.

Any idea how i can get this going again? Otherwise how do I arrange an RMA?

Tia!

Zwp123