Hi, after run this command to install Flarum I got error:
composer create-project flarum/flarum . --stability=beta
Fatal error: Uncaught Error: Call to undefined function Symfony\Polyfill\Mbstring\iconv() in phar:///opt/cpanel/composer/bin/composer/vendor/symfony/polyfill-mbstring/Mbstring.php:661
Stack trace:
#0 phar:///opt/cpanel/composer/bin/composer/vendor/symfony/polyfill-mbstring/bootstrap.php(48): Symfony\Polyfill\Mbstring\Mbstring::mb_strwidth(' [Composer\Dow...', 'ASCII')
#1 phar:///opt/cpanel/composer/bin/composer/vendor/symfony/console/Helper/Helper.php(54): mb_strwidth(' [Composer\Dow...', 'ASCII')
#2 phar:///opt/cpanel/composer/bin/composer/vendor/symfony/console/Application.php(654): Symfony\Component\Console\Helper\Helper::strlen(' [Composer\Dow...')
#3 phar:///opt/cpanel/composer/bin/composer/vendor/symfony/console/Application.php(127): Symfony\Component\Console\Application->renderException(Object(Composer\Downloader\TransportException), Object(Symfony\Component\Console\Output\StreamOutput))
#4 phar:///opt/cpanel/composer/bin/composer/src/Composer/Console/Application.php(103): Symfony\Component\Console\Applicatio in phar:///opt/cpanel/composer/bin/composer/vendor/symfony/polyfill-mbstring/Mbstring.php on line 661