files in vendor/composer/ deleted

I am working in a laravel project. Suddenly I am facing this error:

PHP Warning: require_once(/home/shafi/Projects/Lib/vendor/composer/autoload_real.php): failed to open stream: No such file or directory in /home/shafi/Projects/Lib/vendor/autoload.php on line 5 PHP Fatal error: require_once(): Failed opening required '/home/shafi/Projects/Lib/vendor/composer/autoload_real.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/shafi/Projects/Lib/vendor/autoload.php on line 5

As the error message says I looked at the vendor/composer/ folder which contains only

• autoload_classmap.php
• installed.json

But in another laravel project I found the following files in vendor/composer/:

• autoload_classmap.php
• autoload_psr4.php
• installed.json
• autoload_files.php
• autoload_real.php
• LICENSE
• autoload_namespaces.php
• ClassLoader.php

How can I solve this?

via Chebli Mohamed