If you are having a problem with your website, the first thing to check is the error logs for the domain.
On our Linux shared hosting account the error logs for a domain can be accessed by going to:
Manage Website > 'Log Manager' > 'Show FTP Directory' > 'error_log' - These logs are generated on a per webspace basis.
If the Log Manager screen shows an IP6 address, and not a standard IP4 one, opening the FTP directory will give an error. If that happens, the logs can be found in your File Manager, in a folder called Logs.