Fatal error: Uncaught Error: Class 'GuzzleHttp\ClientInterface' not found in /home/strongan/public_html/underdev/vendor/guzzlehttp/guzzle/src/functions.php:13 Stack trace: #0 {main} thrown in /home/strongan/public_html/underdev/vendor/guzzlehttp/guzzle/src/functions.php on line 13