Thread:Project:Support desk/This appears to be a cross-site request forgery; canceling save./reply (18)

I found the source and a bypass to the problem. When Bluespice extension "WikiAdmin" is activated, it seams to remove the namespace created by the Semantic MediaWiki extention, to be more precise, the Property, Type and Concept Namespace (and there "talk" ones). So when Forms try to add something to a namespace that no longer exist, it give the cross-site request forgery. The bypass I found is not "by the book", but it works. Just create the namespaces somewhere else, I put them in the LocalSettings.php by adding these lines: $wgExtraNamespaces[102] = "Property"; $wgExtraNamespaces[103] = "Property_talk"; $wgExtraNamespaces[104] = "Type"; $wgExtraNamespaces[105] = "Type_talk"; $wgExtraNamespaces[108] = "Concept"; $wgExtraNamespaces[109] = "Concept_talk";

Hope it helps!