Fatal error: Uncaught Error: Interface 'Http\Promise\Promise' not found in /home4/renewrit/public_html/billing.renewrite.in/vendor/php-http/guzzle6-adapter/src/Promise.php:20 Stack trace: #0 {main} thrown in /home4/renewrit/public_html/billing.renewrite.in/vendor/php-http/guzzle6-adapter/src/Promise.php on line 20