Warning: require(E:\xampp\htdocs\vendor/symfony/polyfill-mbstring/bootstrap.php): failed to open stream: No such file or directory in E:\xampp\htdocs\vendor\composer\autoload_real.php on line 55

Fatal error: require(): Failed opening required 'E:\xampp\htdocs\vendor/symfony/polyfill-mbstring/bootstrap.php' (include_path='E:\xampp\php\PEAR') in E:\xampp\htdocs\vendor\composer\autoload_real.php on line 55