Thread:Project:Support desk/Suddenly I can not delete images anymore/reply (2)

By adding $wgGroupPermissions['*']['delete'] = true; I can now delete images, but still when I make a new page and I click on the red link to upload an image (f.e. http://www.ngw.nl/heraldrywiki/index.php?title=Special:Upload&wpDestFile=Velkymeder.jpg) I get a message that I am not logged in. When I use the same page without the file title, like http://www.ngw.nl/heraldrywiki/index.php?title=Special:Upload I can upload a file and I am logged in. I also can not add categories to or move images, as it thinks I am not logged in.

I also made a new administrator account, but that has the same problems. The problem is the same on multiple computers and all browsers. It thus seems that somehow I did something that protected (?) the whole Namespace File...