The most common reason for a website’s failure to open after an SSL installation is the change of the IP address. The SSL certificate requires a Dedicated IP which replaces your current account IP address. After such a change there is a short propagation period that can take up to 24 hours, after this time has passed everything should be completely functional.
Should the issue persist after this period, please contact our Support Team through ticketing system and they will gladly check into it and assist you.