Why is laravel showing a server error

Question

I am looking to get a simple site up using laravel 5.1 I have a ubuntu 14.10 box and file zilla. After dragging the contents of my app folder over to var/www/html/ I have changed the /etc/apache2/sites-availablemyapp.conf to read

<VirtualHost *:80> ServerName 104.236.27.195 ServerAlias mugendoassociationofireland.ie
DocumentRoot "/var/www/html/public"
<Directory "/var/www/html/public/">
    AllowOverride All
    Order allow,deny
    Allow from all
</Directory>
</VirtualHost>

I keep getting a server error but the pointer is working. When I swap out the index.php content to 'hello' then the page will display this. Any idea what could be missing?