Error autoload laravel

Ini kenapa bisa error gini ya, udah composer install, update dll. udah cek file yg error juga nih

Warning: require(C:\xampp\htdocs\project\public/project/bootstrap/autoload.php): failed to open stream: No such file or directory in C:\xampp\htdocs\project\public\index.php on line 22

Fatal error: require(): Failed opening required 'C:\xampp\htdocs\project\public/project/bootstrap/autoload.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\project\public\index.php on line 22