Warning: require(./vendor/autoload.php): Failed to open stream: No such file or directory in /lamp/www/quantix/vendor/green-api/whatsapp-api-client-php/examples/receiveNotification.php on line 3

Fatal error: Uncaught Error: Failed opening required './vendor/autoload.php' (include_path='.:') in /lamp/www/quantix/vendor/green-api/whatsapp-api-client-php/examples/receiveNotification.php:3 Stack trace: #0 {main} thrown in /lamp/www/quantix/vendor/green-api/whatsapp-api-client-php/examples/receiveNotification.php on line 3