Fatal error: Uncaught Error: Interface "MediaWiki\Hook\SidebarBeforeOutputHook" not found in /var/www/html/w/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/SidebarBeforeOutput.php:22 Stack trace: #0 {main} thrown in /var/www/html/w/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/SidebarBeforeOutput.php on line 22