Fatal error: Uncaught Error: Interface "MediaWiki\Installer\Hook\LoadExtensionSchemaUpdatesHook" not found in /home/hiphopdi/public_html/wiki2/extensions/Math/src/HookHandlers/SchemaHooksHandler.php:12 Stack trace: #0 {main} thrown in /home/hiphopdi/public_html/wiki2/extensions/Math/src/HookHandlers/SchemaHooksHandler.php on line 12