Greenbone Enterprise TRIAL 22.04.6 (Oracle VirtualBox 7.0) -> The Feed Server is not reachable

I have installed ‘Greenbone Enterprise TRIAL’ (22.04.6) on Oracle VirtualBox (7.0).

When I start the ‘Greenbone Enterprise TRIAL’, I get the following error message:

'The Feed Server is not reachable. Check your network and firewall configuration.

At Network I have configured ‘NAT Network’

Does anyone know how I can fix this error?

Thank you for your support.