Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Kernel" not found in /home/iotechtniu/ioacademy/vendor/knpuniversity/oauth2-client-bundle/tests/app/TestKernel.php:21 Stack trace: #0 {main} thrown in /home/iotechtniu/ioacademy/vendor/knpuniversity/oauth2-client-bundle/tests/app/TestKernel.php on line 21