What can cause this?

Sometimes loading bug and i got this error what can cause it? And how to get it manually if possible?
imgur: the simple image sharer

Cheating... lol

Originally Posted by kola95

Sometimes loading bug and i got this error what can cause it? And how to get it manually if possible?
imgur: the simple image sharer

It happens even with normal client run from their website. I wouldn't know how to force the error. It randomly comes up for me.

Im use my own client downloaded from RotMG webside and I get this error 2-3 times randomly per day. Just want to know what it can cause :P

It happens randomly, Dont worry ;p

HelpWhat can cause this?