Warning: require_once(/composer2/vendor/autoload.php): Failed to open stream: No such file or directory in /var/www/html/lab/sms.php on line 7

Fatal error: Uncaught Error: Failed opening required '/composer2/vendor/autoload.php' (include_path='.:/usr/share/php') in /var/www/html/lab/sms.php:7 Stack trace: #0 {main} thrown in /var/www/html/lab/sms.php on line 7