Thread:Project:Support desk/After edit the Sidebar, complete Mediawiki broken!

Hey Guys,

I had edit my Mediawiki (with BlueSpice Free). The newest Version.

So i want to edit my Sidebar next.

but now after the editing is nothing to show!

I See only the header, not more.. (Look at screenshot) and my Firebug says: 500 Internal Server Error - http://localhost/wiki/index.php/"

Here is the .jpeg (Imageshack)