Warning: require_once(/var/www/html/vendor/composer/autoload_real.php): Failed to open stream: No such file or directory in /var/www/html/vendor/autoload.php on line 23

Fatal error: Uncaught Error: Failed opening required '/var/www/html/vendor/composer/autoload_real.php' (include_path='.:/usr/local/lib/php') in /var/www/html/vendor/autoload.php:23 Stack trace: #0 /var/www/html/app/autoload.php(51): include() #1 /var/www/html/app/bootstrap.php(44): require_once('/var/www/html/a...') #2 /var/www/html/pub/index.php(12): require('/var/www/html/a...') #3 {main} thrown in /var/www/html/vendor/autoload.php on line 23