Running CC v3 on an AWS EC2 T2 Small instance on Ubuntu 16.0.4.  Nothing else running on that server

For some reason, every few days my Admin panel goes unreachable. I get the error "Sorry, an error occurred while attempting to load the requested page. "whenever try to access it from browser. However, I am able to SSH into my system no problem, and a simple reboot fixes it for a few days.

Can anyone help me with this? If you want error logs just let me know what commands to run and I can do that.

I admit, I am a Linux newbie, only been using it for about a year, but I can get around ok with some help.

Anybody?