Fatal error: Uncaught Error: Interface "MediaWiki\Hook\SidebarBeforeOutputHook" not found in /home/floten1/q.tenbergen.ca/extensions/CheckUser/src/HookHandler/SidebarLinksHandler.php:16 Stack trace: #0 {main} thrown in /home/floten1/q.tenbergen.ca/extensions/CheckUser/src/HookHandler/SidebarLinksHandler.php on line 16