Fatal error: Uncaught Error: Interface "MediaWiki\User\Hook\UserGetDefaultOptionsHook" not found in /home/hiphopdi/public_html/wiki2/extensions/Math/src/HookHandlers/PreferencesHooksHandler.php:10 Stack trace: #0 {main} thrown in /home/hiphopdi/public_html/wiki2/extensions/Math/src/HookHandlers/PreferencesHooksHandler.php on line 10