v7.2.2,build1255,220930 - Unstable Internet Access - Unable to connect to Fortiguard servers

Good day and Happy new year for everybody

I have an issue with a Fortigate 60F.

Employees start to complain some websites are not opened randomly however the sites are reachable by pinging it from the fiewall, at checking i found the below:

1. I am not able to create any firewall rule and get error creating CMDBError: Expected response argument to be an object or string, got null
2. Firewall message unable to connect to Fortiguard server and WAN IP is unknown
   1. I run the below commands but get an error Unknown action 0 with the last command
      

      # config system global
          set cloud-communication enable
      end
      
      

      # config system central-management
          include-default-servers enable
      end

3. When trying to activate the Forti Cloud i got error FortiGate cloud internal error
4. I changed the DNS but the same issue exist.
5. I tried to upgrade the firmware to FGT_60F-v7.2.3.F-build1262-FORTINET failed
6. I tried to downgrade to firmware FGT_60F-v7.2.1.F-build1254-FORTINET failed also.

Appreciate yor support,

Thanks

#Fortigate FortiGuard