PHP Error

I keep getting these errors on my server for mautic, and have no idea how to fix them. I’m also having trouble with amazon ses not confirming mautic subscription for bounce management, but am new to all this, so i’m not sure if these are related or not.

Code:
mautic.CRITICAL: Uncaught PHP Exception SymfonyComponentDependencyInjectionExceptionServiceNotFoundException: "You have requested a non-existent service "swiftmailer.mailer.transport.smtp"." at /home/sheisc5/mautic/vendor/symfony/dependency-injection/Container.php line 305 {"exception":"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service "swiftmailer.mailer.transport.smtp". at /home/sheisc5/mautic/vendor/symfony/dependency-injection/Container.php:305)"} []

any idea what this is?

I keep getting these errors on my server for mautic, and have no idea how to fix them. I’m also having trouble with amazon ses not confirming mautic subscription for bounce management, but am new to all this, so i’m not sure if these are related or not.

mautic.CRITICAL: Uncaught PHP Exception SymfonyComponentDependencyInjectionExceptionServiceNotFoundException: "You have requested a non-existent service "swiftmailer.mailer.transport.smtp"." at /home/sheisc5/mautic/vendor/symfony/dependency-injection/Container.php line 305 {"exception":"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service "swiftmailer.mailer.transport.smtp". at /home/sheisc5/mautic/vendor/symfony/dependency-injection/Container.php:305)"} []

any idea what this is?