after install auth2.0 server Laravel5.1 give an server error

I have successfully installed Laravel5.1 localhost/myproject/public link is working well.

After that I installed Auth2.0 server accroding to this. http://ift.tt/1NVuhqC

After install and configure I called the url http://localhost/myproject/public/oauth/access_token and its giving 500 server error for all the url with http://localhost/myproject/public

Can anyone help me please.

Thanks.

via Chebli Mohamed