DAPPMANAGER error: Port 4321 is not open

Any advice on what the cause of these errors in the DappManager logs is. I’ve tried changing the NAT filtering to Open on the router. I can access over VPN so I know ports 1194 and 8092 are open.

Those mean that the DAppnode is not being able to find them opened, ports seem closed to its point of view.
Please check that your router interface has saved the changes correctly or there are no errors