HELP - my backround dissapeared

i was in the forum did not do anything special - was not even in admin - was just posting
when suddenly my background dissapeared and now it looks like this. Can someone help please?

I am totally clueless as to what may have happened.

try re-installing the background.

I am also having this issue, this has never happened before. Any advice from mods?

Which skins are you guys using?

vista still black by jalokim

Okay, here is an only topic to this problem.

https://help.forumotion.com/manage-the-appearance-of-your-forum-f45/only-topic-jalokim-themes-image-bandwidth-problems-t34703.htm