How to fix 503 Service Unavailable?
Since this morning (12 hrs ago), my WHMCS client area started showing 503 Service Unavailable, but the admin area is accessible - though unable to save anything (Shows 503 too).
From my knowledge, 503 means the server might be overloaded, but all the other websites hosted on the same server are fine, I can also access cPanel and WHM fine.
I only host WHMCS on this reseller account, so all of my other webpages are separated to different servers.
I can't quite figure out why this is happening and how I can fix it... after trying to Google the issue, I didn't get much helpful info on that except telling me it's the server's fault.
