[CI2.1.4] This page isn’t working website is currently unable to handle this request.

Ah, I figured. This is the CI v4 support forum.

Well, before this thread gets moved a couple things.

CI 3.1.4 is the latest, you should upgrade to that before you try running on PHP7. I understand they're not going to do any further updates for CI2. Otherwise, you're stuck in the PHP 5.3/5.4 ish which is not ideal.

Enliven Applications - Open Blog is now Pubvana - CI4 Tutorials