Fatal error: Uncaught Error: Interface "App\Module\Campaigns\Service\Email\Trackers\EmailTrackerManagerInterface" not found in /var/www/crm_killing_ninja/core/modules/Campaigns/Service/Email/Trackers/DefaultEmailTrackerManager.php:38 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/core/modules/Campaigns/Service/Email/Trackers/DefaultEmailTrackerManager.php on line 38