Fatal error: Uncaught UnexpectedValueException: callback 'SemanticResultFormats::initExtension' is not callable in /app/_mediawikisrc/includes/registration/ExtensionRegistry.php:525 Stack trace: #0 /app/_mediawikisrc/includes/registration/ExtensionRegistry.php(279): ExtensionRegistry->exportExtractedData(Array) #1 /app/_mediawikisrc/includes/Setup.php(278): ExtensionRegistry->loadFromQueue() #2 /app/_mediawikisrc/includes/WebStart.php(86): require_once('/app/_mediawiki...') #3 /app/_mediawikisrc/index.php(44): require('/app/_mediawiki...') #4 {main} thrown in /app/_mediawikisrc/includes/registration/ExtensionRegistry.php on line 525