Warning: require(/var/www/vendor/symfony/polyfill-mbstring/bootstrap.php): failed to open stream: No such file or directory in /var/www/vendor/composer/autoload_real.php on line 71

Fatal error: require(): Failed opening required '/var/www/vendor/composer/../symfony/polyfill-mbstring/bootstrap.php' (include_path='.:/usr/local/lib/php') in /var/www/vendor/composer/autoload_real.php on line 71