Nginx default page instead of Virtualmin default page

| SYSTEM INFORMATION |
| OS type and version | Ubuntu Linux 20.04.5 |
| Virtualmin version | 7.3-1 |
| Build | Nginx |

I have just created a new virtual server and everything first seemed to go well
BUT on visiting the url in a browser I get the Nginx default page instead of the Virtualmin default page!

I cannot figure out what is going wrong.

I have tried deleting the virtual server and adding it again (no errors reported) but still the same “Welcome to nginx!” Other websites on the box seem to be running ok