I installed WordPress in a subdomain so I could develop a new site, however, when visiting the new URL, I got a site not found error. Called tech support, and found out that the main domain’s DNS was the cause. For this particular domain, the email is hosted elsewhere. All I had to do was add an “A” record to the domain’s DNS with a value equal to the name of the subdomain, in this case “preview” and with the IP address of the domain.