E088C431BDF5F28D6what was your error code?
Sounds like you added a subdomain in the Hosting control panel. With x10 free account, subdomains are considered to be 1 of your add on domains. You would have to add the subdomain in the account panel: https://x10hosting.com/loginTicket # E088C431BDF5F28D6
I tried adding a subdomain under my main domain to test it.
Below is the message I get when I try to log-in:Sounds like you added a subdomain in the Hosting control panel. With x10 free account, subdomains are considered to be 1 of your add on domains. You would have to add the subdomain in the account panel: https://x10hosting.com/login
Below is the message I get when I try to log-in: