 <p>The error tells you everything you need to know.</p> <p>You are simply missing a required PHP extension, <code>Mbstring</code>.</p> <p>You either need to install the package or enable it through your <code>php.ini</code> file. </p> <p><strong>php.ini</strong></p> <p>Find this line <code>;extension=php_mbstring.dll</code> and uncomment it by removing the <code>;</code> so it reads <code>extension=php_mbstring.dll</code></p> <p>Or just run <code>php5enmod mbstring</code> if your system allows it</p> <p><strong>Install it</strong></p> <p>In a linux/debian based system it would just be <code>apt-get install libapache2-mod-php5</code>. The package includes the extension as well as everything else you need for Laravel. Considering you have no other errors on install, you likely already have this and just need to enable it in your <code>php.ini</code> file</p>