Sub domain issue

My server working without any problem before i can make subdomain and everything working smooth

but i have some issue after updating the server, after the update when I create a subdomain it's only showing Forbidden

You don't have permission to access / on this server.

and when i delete the subdomain the subdomain should not be in there, but when i am browsing subdomain and type it on my web browser it says it's work.

how i can solve this one.

any one could you guide me how to solve it.

Hello,

Rebuild webservers
webserver settings > select webservers > select your option and rebuild