No access from WAN/Cellular after upgrading GX400 to 4.4.5

After GX400 firmware upgrade to OpenSIM I don’t have access to the router from WAN/Cellular interface. I cannot ping the public IP address nor connect to OTA management.

From LAN I have access to the router and to remote network.

Is there a new configuration that I must add?

Hello xarxa,
Are you using static public IP for your gateway?

Yes, I’m using static public IP.