Fatal error: Uncaught Symfony\Component\DependencyInjection\Exception\InvalidArgumentException: There is no extension able to load the configuration for "swiftmailer" (in "/var/www/html/var/config/system.yml"). Looked for namespace "swiftmailer", found ""framework", "security", "twig", "monolog", "doctrine", "doctrine_migrations", "sensio_framework_extra", "cmf_routing", "presta_sitemap", "scheb_two_factor", "fos_js_routing", "flysystem", "pimcore", "pimcore_admin", "pimcore_data_hub", "pimcore_data_importer", "twig_extra", "template_engine", "stimulus_kendo_ui", "stimulus_website", "frontend_libraries", "stimulus_commerce"". in /var/www/html/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php:800 Stack trace: #0 /var/www/html/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(775): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->validate(Array, '/var/www/html/v...') #1 /var/www/html/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php(123): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->loadFile('/var/www/html/v...') #2 /var/www/html/vendor/symfony/config/Loader/DelegatingLoader.php(40): Symfony\Component\DependencyInjection\Loader\YamlFileLoader->load('/var/www/html/v...', NULL) #3 /var/www/html/vendor/pimcore/pimcore/lib/Kernel.php(182): Symfony\Component\Config\Loader\DelegatingLoader->load('/var/www/html/v...') #4 /var/www/html/vendor/symfony/http-kernel/Kernel.php(649): Pimcore\Kernel->registerContainerConfiguration(Object(Symfony\Component\Config\Loader\DelegatingLoader)) #5 /var/www/html/vendor/symfony/http-kernel/Kernel.php(545): Symfony\Component\HttpKernel\Kernel->buildContainer() #6 /var/www/html/vendor/pimcore/pimcore/lib/Kernel.php(343): Symfony\Component\HttpKernel\Kernel->initializeContainer() #7 /var/www/html/vendor/symfony/http-kernel/Kernel.php(789): Pimcore\Kernel->initializeContainer() #8 /var/www/html/vendor/symfony/http-kernel/Kernel.php(128): Symfony\Component\HttpKernel\Kernel->preBoot() #9 /var/www/html/vendor/pimcore/pimcore/lib/Kernel.php(322): Symfony\Component\HttpKernel\Kernel->boot() #10 /var/www/html/vendor/pimcore/pimcore/lib/Bootstrap.php(262): Pimcore\Kernel->boot() #11 /var/www/html/web/app.php(32): Pimcore\Bootstrap::kernel() #12 {main} thrown in /var/www/html/vendor/symfony/dependency-injection/Loader/YamlFileLoader.php on line 800