Fatal error: Uncaught Error: Interface "MediaWiki\Hook\SidebarBeforeOutputHook" not found in C:\xampp\htdocs\extensions\CheckUser\src\HookHandler\SidebarLinksHandler.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\extensions\CheckUser\src\HookHandler\SidebarLinksHandler.php on line 16