No URL click tracking

Your software
My Mautic version is: 2.16.0
My PHP version is: PHP Version 7.1.33

Your problem
My problem is: in Segment emails URLs like http://tiny.cc/6ftury are not being tracked.

These errors are showing in the log:
[2020-06-29 20:27:08] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: “You have requested a non-existent service “swiftmailer.mailer.transport.smtp”.” at /var/www/html/vendor/symfony/dependency-injection/Container.php line 286 {“exception”:"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service “swiftmailer.mailer.transport.smtp”. at /var/www/html/vendor/symfony/dependency-injection/Container.php:286)"}
[2020-06-29 20:27:28] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: “You have requested a non-existent service “swiftmailer.mailer.transport.smtp”.” at /var/www/html/vendor/symfony/dependency-injection/Container.php line 286 {“exception”:"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service “swiftmailer.mailer.transport.smtp”. at /var/www/html/vendor/symfony/dependency-injection/Container.php:286)"}
[2020-06-29 20:27:29] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: “You have requested a non-existent service “swiftmailer.mailer.transport.smtp”.” at /var/www/html/vendor/symfony/dependency-injection/Container.php line 286 {“exception”:"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service “swiftmailer.mailer.transport.smtp”. at /var/www/html/vendor/symfony/dependency-injection/Container.php:286)"}
[2020-06-29 20:27:50] mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: “You have requested a non-existent service “swiftmailer.mailer.transport.smtp”.” at /var/www/html/vendor/symfony/dependency-injection/Container.php line 286 {“exception”:"[object] (Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException(code: 0): You have requested a non-existent service “swiftmailer.mailer.transport.smtp”. at /var/www/html/vendor/symfony/dependency-injection/Container.php:286)"}

Steps I have tried to fix the problem: read the forum, but no answer found on how am I supposed to troubleshoot this.

Any suggestion or help on how to make a trackable link would be highly appreciated.

looks like an issue with SNS maybe:
https://app.slack.com/client/T02GEN0Q6/C02GEN0SG/thread/C02GEN0SG-1590066165.350300