Fatal error: Uncaught Error: Class 'Symfony\Bundle\MonologBundle\MonologBundle' not found in /var/www/symfony/app/AppKernel.php:21 Stack trace: #0 /var/www/symfony/app/bootstrap.php.cache(2702): AppKernel->registerBundles() #1 /var/www/symfony/app/bootstrap.php.cache(2528): Symfony\Component\HttpKernel\Kernel->initializeBundles() #2 /var/www/symfony/app/bootstrap.php.cache(2560): Symfony\Component\HttpKernel\Kernel->boot() #3 /var/www/symfony/web/app.php(28): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #4 {main} thrown in /var/www/symfony/app/AppKernel.php on line 21