Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in /var2/www/pfip.au-html/kwidgyboo/php-chatbot-1.0.2/src/Adapters/Symfony/DependencyInjection/PhpChatbotExtension.php:19 Stack trace: #0 {main} thrown in /var2/www/pfip.au-html/kwidgyboo/php-chatbot-1.0.2/src/Adapters/Symfony/DependencyInjection/PhpChatbotExtension.php on line 19