Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromisorInterface" not found in /home/customer/www/londonfencingclub.co.uk/public_html/vendor/guzzlehttp/promises/src/EachPromise.php:8 Stack trace: #0 {main} thrown in /home/customer/www/londonfencingclub.co.uk/public_html/vendor/guzzlehttp/promises/src/EachPromise.php on line 8