Error: 1-Click Video Ranker requires PHP sessions

Sometimes, you may get an error similar to:

Sorry but 1-Click Video Ranker requires PHP sessions. There was an error trying to start a session. Please, contact your hosting support in order to resolve the problem.

In that case, please contact your host and ask them to enable PHP sessions on your hosting account, and the plugin should work. 95%+ of all hosts should have this enabled by default.