If SSL is not active on your hostname or cPanel services, there's a command you can run to check them all, attempt to install and fix them all, and get messages for any errors. You'll need to run this with root access in a command line program like Putty, or you can run the command in your WHM's terminal section. The code to fix and install all SSL on a cPanel server is:
/usr/local/cpanel/bin/checkallsslcerts --verbose --allow-retry