Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\Kernel' not found in /home/cooplafobq/newplanning/vendor/symfony/assetic-bundle/Tests/TestKernel.php:18 Stack trace: #0 {main} thrown in /home/cooplafobq/newplanning/vendor/symfony/assetic-bundle/Tests/TestKernel.php on line 18