Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in /home/maborneapp/public_html/sii/vendor/guzzlehttp/promises/src/Promise.php:10
Stack trace:
#0 {main}
thrown in /home/maborneapp/public_html/sii/vendor/guzzlehttp/promises/src/Promise.php on line 10