There are few checks that you should go through in order to determine why your website is not working after the SSL certificate installation:
- Does your application require any specific configuration to work with SSL?
CMS applications like WordPress or Joomla! require additional configuration to work with SSL. For WordPress and Joomla! websites hosted with Cloud DataWorks you can enable SSL via the WordPress/Joomla Toolkits in Plesk
If you purchased an SSL certificate with a dedicated IP from Cloud DataWorks, keep in mind that assigning a dedicated IP to your hosting account also means that your domain's DNS records will be updated to reflect the new IP. DNS changes take time to propagate and during this time you might still resolve the domain to your account's old IP address, which might prevent you opening up the site correctly.