Fatal error: Uncaught Error: Interface "Inpsyde\Zettle\PhpSdk\Image\ImageFormatRetrieverInterface" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-php-sdk/src/Image/ExtensionImageFormatRetriever.php:12 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-php-sdk/src/Image/ExtensionImageFormatRetriever.php on line 12