Fatal error: Uncaught Error: Interface "Inpsyde\Zettle\PhpSdk\API\Webhooks\Entity\Payload" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-php-sdk/src/API/Webhooks/Entity/ZettlePayload.php:7 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-php-sdk/src/API/Webhooks/Entity/ZettlePayload.php on line 7