error while installing composer and open project

Error when i use this command composer install ,

Fatal error: composerRequire1ee160e16912ab41755f87617b1e4590(): Failed opening required 'C:\xampp\htdocs\try\ytl\vendor\composer/../psy/psysh/src/functions.php' (include_path='C:\xam pp\php\PEAR') in C:\xampp\htdocs\try\ytl\vendor\composer\autoload_real.php on line 66

when i open project in browser : error

Warning: require(C:\xampp\htdocs\try\ytl\vendor\composer/../psy/psysh/src/functions.php): failed to open stream: No such file or directory in C:\xampp\htdocs\try\ytl\vendor\composer\autoload_real.php on line 66

Fatal error: require(): Failed opening required 'C:\xampp\htdocs\try\ytl\vendor\composer/../psy/psysh/src/functions.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\try\ytl\vendor\composer\autoload_real.php on line 66

tired with below command:

composer dump-autoload

below code in vendor/autoload.php:

<?php

// autoload.php @generated by Composer

require_once __DIR__ . '/composer/autoload_real.php';

return ComposerAutoloaderInit1ee160e16912ab41755f87617b1e4590::getLoader();

via Chebli Mohamed