When a slave site is configured into Joomla Multi Sites, an Joomla installation is required to create and fill the slave site database and to create the specific configuration files.

An error was reported when trying to install the sample data during the Joomla Installation.
A message box appears with the message "Error: the XML response that was returned from the server is invalid" and after PHP error is reported like "Undefined index: DBtype in /home/heinoset/muut_html/joomla/installation/installer/models/model.php on line 764"

This error is due to a missing Joomla Multi Sites patch into the standard joomla installation directory.

We have also fix some URL inconsistency used for the help screens.