You must not remove index.php. Instead, make sure that your webserver serves index.html in front of index.php.
If you use Apache, make sure you have ,htaccess in the public_html: https://github.com/DevelopersPL/DevAAC/blob/master/public_html/.htaccess
If you use Apache, make sure you have ,htaccess in the public_html: https://github.com/DevelopersPL/DevAAC/blob/master/public_html/.htaccess