500 Internal Server Error

I am stared using DigitalOcean a month ago and an hour ago I decided to back up my DB using PHPMyAdmin but unfortunately, I entered the wrong password a few times.
And It started showing HTTP ERROR 500. So, later on, I use the Power cycle from DO.
So, now the site is down.

I can access the console.

CC @GulshanKumar

Please restore site from backup/snapshot if you have taken.