I was using Magento's default backup function when all of a sudden, all pages went 404.
After digging out more information on this error, it was actually caused by permission error. I changed some of the permissions and ran a code(refer to reference post) and got it running again.
While this has been an ongoing error all along, is there an easier/faster way to execute system backup?
Currently, I am using phpmyadmin and cPanel as manual backup.