Fatal error: Uncaught Error: Interface "Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\symfony\mailer\Transport\Smtp\Auth\PlainAuthenticator.php:21 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\symfony\mailer\Transport\Smtp\Auth\PlainAuthenticator.php on line 21