Your software
My Mautic version is: 4.15.0
My PHP version is: 7.4.16
My Database type and version is: ?
Your problem
My problem is: Cannot Create Email Channels or Send Emails
These errors are showing in the log:
[2021-04-27 00:20:07] mautic.NOTICE: Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: The “swiftmailer.transport.real” service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead. (uncaught exception) at /var/www/html/mautic/vendor/symfony/dependency-injection/Container.php line 275 while running console command mautic:emails:send
[2021-04-27 00:20:07] mautic.WARNING: Command mautic:emails:send
exited with status code 1
Steps I have tried to fix the problem: None