Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in /home/iotechtniu/ioacademy/vendor/knpuniversity/oauth2-client-bundle/src/DependencyInjection/KnpUOAuth2ClientExtension.php:84 Stack trace: #0 {main} thrown in /home/iotechtniu/ioacademy/vendor/knpuniversity/oauth2-client-bundle/src/DependencyInjection/KnpUOAuth2ClientExtension.php on line 84