Fatal error: Uncaught UnexpectedValueException: callback 'SemanticResultFormats::initExtension' is not callable in /var/www/w/includes/registration/ExtensionRegistry.php:585 Stack trace: #0 /var/www/w/includes/registration/ExtensionRegistry.php(333): MediaWiki\Registration\ExtensionRegistry->exportExtractedData() #1 /var/www/w/includes/Setup.php(293): MediaWiki\Registration\ExtensionRegistry->loadFromQueue() #2 /var/www/w/includes/WebStart.php(85): require_once('...') #3 /var/www/w/index.php(50): require('...') #4 {main} thrown in /var/www/w/includes/registration/ExtensionRegistry.php on line 585