Warning: require_once(/home/magento/htdocs/vendor/composer/autoload_real.php): Failed to open stream: No such file or directory in /home/magento/htdocs/vendor/autoload.php on line 5

Fatal error: Uncaught Error: Failed opening required '/home/magento/htdocs/vendor/composer/autoload_real.php' (include_path='.:/usr/local/lib/php') in /home/magento/htdocs/vendor/autoload.php:5 Stack trace: #0 /home/magento/htdocs/app/autoload.php(51): include() #1 /home/magento/htdocs/app/bootstrap.php(44): require_once('/home/magento/h...') #2 /home/magento/htdocs/pub/index.php(12): require('/home/magento/h...') #3 {main} thrown in /home/magento/htdocs/vendor/autoload.php on line 5