Fatal error: Uncaught Error: Interface "Dhii\Validation\Exception\ValidationFailedExceptionInterface" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/vendor/dhii/validator/src/Exception/ValidationFailedException.php:16 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/vendor/dhii/validator/src/Exception/ValidationFailedException.php on line 16