I am using Laradock as my server, PHP 7.2.4. Laravel 5.7 installation works well but 5.8 not working anyway. command: composer create-project --prefer-source laravel/laravel watchcrunch "5.8.3" Output ...

SERVER: XAMPP PHP: 7.1.17 or higher Composer 1.6.5 or higher (1.8.3 used) Laravel 5.8 model cloud storage. Basic upload, download, delete, functions; equipped with recycle bin.