Do you know what version of MediaWiki you’re using? If it’s 1.27 or 1.28, it might be that you’re using the wrong mediawiki cookie prefix. See also this post on the forum
Do you know what version of MediaWiki you’re using? If it’s 1.27 or 1.28, it might be that you’re using the wrong mediawiki cookie prefix. See also this post on the forum