So I was recently running some updating on my Linux server such as my PHP version for Centmin Mod. I upgraded it to 7.0.2 Stable version and all was well shortly after. A few minutes ago, one of my Administrators let me know it's completely inaccessible. I tried logging in via all themes I have (including Default), and that didn't work. I tried logging in through the ACP and it still didn't work. It doesn't indicate any errors, all it does is refresh the index page.
Does anyone know what I could have possibly done wrong?