Fatal error: Uncaught Error: Interface "Psr\Http\Client\ClientExceptionInterface" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-auth/src/Exception/InvalidTokenException.php:10 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/zettle-auth/src/Exception/InvalidTokenException.php on line 10