Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromiseInterface' not found in /var/www/support-dev.maxperutzlabs.ac.at/api/vendor/guzzlehttp/promises/src/Promise.php:14 Stack trace: #0 {main} thrown in /var/www/support-dev.maxperutzlabs.ac.at/api/vendor/guzzlehttp/promises/src/Promise.php on line 14