Just signed up for hosted version by 3CX, but accidentally hit release fqdn in the customer portal, is there a way to resolve this as the system isn’t working now ?
Try restarting the PBX services and see if the key is re-bound to the FQDN. Make sure that the key has not been associated with another FQDN since if was released.
If this does not work then you will need to re-install the system as @craigreilly mentioend