Warning: require_once(/htdocs/vendor/composer/autoload_real.php): Failed to open stream: No such file or directory in /htdocs/vendor/autoload.php on line 20

Fatal error: Uncaught Error: Failed opening required '/htdocs/vendor/composer/autoload_real.php' (include_path='.:/usr/share/php') in /htdocs/vendor/autoload.php:20 Stack trace: #0 /htdocs/index.php(34): require() #1 {main} thrown in /htdocs/vendor/autoload.php on line 20