Resolved Subdomain not reachable after 'Add Subdomain' with OVH

[tobwun]

Hello, I am using Plesk Obsidian 18.0.28 Update #3 with OVH. I have a domain and one subdomain working. I set this up using an older version of Plesk. Now I updated Plesk and clicked on the 'Add Subdomain' Button. The subdomain was added in the admin interface. However opening the subdomain in the browser returns a 404 (site not reachable).
Thanks for any help

 

[IgorG]

Do you have related A DNS record for this subdomain in domain's DNS zone? In other words, is this subdomain resolvable?

 

[tobwun]

Thank you, yes this was the problem.