Moin,
auch ich hänge immer wieder bei den Shopware Updates und beiße in die Tischkante 
.
Leider wurde dieser Thread bereits geschlossen, denn genau an diesem Fehler hänge ich gerade.
Die in dem Thread erwähnten Lösungsschritte habe ich natürlich bereits durch gekaut.
Gibt es noch Ideen?
Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException {#3273
#message: "You have requested a non-existent service "mailer.default_transport"."
#code: 0
#file: "/var/www/html/vendor/symfony/dependency-injection/ContainerBuilder.php"
#line: 1042
-id: "mailer.default_transport"
-sourceId: null
-alternatives: []
trace: {
/var/www/html/vendor/symfony/dependency-injection/ContainerBuilder.php:1042 { …}
/var/www/html/vendor/shopware/core/Content/Mail/MailerConfigurationCompilerPass.php:20 { …}
/var/www/html/vendor/symfony/dependency-injection/Compiler/Compiler.php:73 { …}
/var/www/html/vendor/symfony/dependency-injection/ContainerBuilder.php:814 { …}
/var/www/html/vendor/symfony/http-kernel/Kernel.php:499 { …}
/var/www/html/vendor/symfony/http-kernel/Kernel.php:744 { …}
/var/www/html/vendor/symfony/http-kernel/Kernel.php:120 { …}
/var/www/html/vendor/shopware/core/Kernel.php:190 { …}
/var/www/html/bin/console:54 {
{closure}
› $application = new Application($kernel);
› $kernel->boot();
›
}
/var/www/html/vendor/autoload_runtime.php:24 { …}
/var/www/html/bin/console:17 { …}
}
}
2025-03-29T07:17:36+00:00 [info] User Deprecated: The "url" connection parameter is deprecated. Please use Doctrine\DBAL\Tools\DsnParser to parse a database url before calling Doctrine\DBAL\DriverManager. (DriverManager.php:257 called by DriverManager.php:173, https://github.com/doctrine/dbal/pull/5843, package doctrine/dbal)
2025-03-29T07:17:36+00:00 [info] User Deprecated: Not configuring a schema manager factory is deprecated. Use Doctrine\DBAL\Schema\DefaultSchemaManagerFactory which is going to be the default in DBAL 4. (Connection.php:227 called by DriverManager.php:197, https://github.com/doctrine/dbal/issues/5812, package doctrine/dbal)
2025-03-29T07:17:36+00:00 [info] User Deprecated: Since shopware/core : The Shopware\Core\Service\Service bundle should be added to config/bundles.php
2025-03-29T07:17:36+00:00 [info] User Deprecated: Since symfony/dependency-injection 7.2: Type "tagged" is deprecated for tag , use "tagged_iterator" instead in "/var/www/html/custom/plugins/SwagPayPal/src/Resources/config/services/webhook.xml".
2025-03-29T07:17:36+00:00 [info] User Deprecated: Since symfony/dependency-injection 7.2: Type "tagged" is deprecated for tag , use "tagged_iterator" instead in "/var/www/html/custom/plugins/SwagPayPal/src/Resources/config/services/pos/webhook.xml".
2025-03-29T07:17:36+00:00 [info] User Deprecated: Since symfony/dependency-injection 7.2: Type "tagged" is deprecated for tag , use "tagged_iterator" instead in "/var/www/html/custom/plugins/PickwareWms/vendor/pickware/mobile-app-auth-bundle/src/OAuth/DependencyInjection/service.xml".
2025-03-29T07:17:36+00:00 [info] User Deprecated: Since shopware/core 6.6.10.0: The fine-grained cache "tagging" configuration is deprecated and will be removed with Shopware 6.7.0.0
2025-03-29T07:17:36+00:00 [critical] Uncaught Exception: You have requested a non-existent service "mailer.default_transport".