Fatal error: Uncaught RuntimeException: The configuration setting 'wgCaptchaClass' was already set by MediaWiki core or another extension, and cannot be set again by QuestyCaptcha. in /var/www/production/w/includes/registration/ExtensionProcessor.php:863 Stack trace: #0 /var/www/production/w/includes/registration/ExtensionProcessor.php(845): ExtensionProcessor->addConfigGlobal() #1 /var/www/production/w/includes/registration/ExtensionProcessor.php(290): ExtensionProcessor->extractConfig2() #2 /var/www/production/w/includes/registration/ExtensionRegistry.php(421): ExtensionProcessor->extractInfo() #3 /var/www/production/w/includes/registration/ExtensionRegistry.php(276): ExtensionRegistry->readFromQueue() #4 /var/www/production/w/includes/Setup.php(278): ExtensionRegistry->loadFromQueue() #5 /var/www/production/w/includes/WebStart.php(86): require_once('/var/www/produc...') #6 /var/www/production/w/index.php(44): require('/var/www/produc...') #7 {main} thrown in /var/www/production/w/includes/registration/ExtensionProcessor.php on line 863