Fatal error: Uncaught Error: Interface "Swift_Signers_HeaderSigner" not found in /var/www/html/pedido_novo/_lib/prod/third/swift/classes/Swift/Signers/DKIMSigner.php:16 Stack trace: #0 {main} thrown in /var/www/html/pedido_novo/_lib/prod/third/swift/classes/Swift/Signers/DKIMSigner.php on line 16