Fatal error: Uncaught Error: Interface "Symfony\Component\Notifier\Channel\ChannelInterface" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\notifier\Channel\BrowserChannel.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\notifier\Channel\BrowserChannel.php on line 21