It's related to the way it is configured. It's trying to load the central notice from:
http://www.tmswiki.org/ppd/The_Tension_Myositis_Syndrome_Wiki?title=Special:...
instead of
http://www.tmswiki.org/w/index.php?title=Special:BannerLoader&banner=Tes...
You seem to have $wgCentralPagePath with its default value.
I suspect that setting
$wgCentralPagePath = "http://www.tmswiki.org/w/index.php";
will fix it.
I've also submitted a change to https://gerrit.wikimedia.org/r/3717 which should provide a better default.
Best regards