Fatal error: Uncaught Error: Class 'GuzzleHttp\Promise\RejectionException' not found in /var/www/typo3/vendor/guzzlehttp/promises/src/CancellationException.php:8
Stack trace:
#0 {main}
thrown in /var/www/typo3/vendor/guzzlehttp/promises/src/CancellationException.php on line 8