Please note that this documentation is for the most recent version of this extension. It may not be relevant for older versions. Related documentation can be found in the documentation directory of the extension.
The importer throws the error "Exception: No site found in root line of page xy" when running - why is that?
The importer accesses your TypoScript settings during execution. To find this, he climbs up the root line from the data container and tries to find a TypoScript template. If it doesn't find a TypoScript template or root page, this error occurs.
But the error is quickly corrected. Just move the data container for the OpenImmo records to a side branch. If you have several side branches on which real estate is displayed, it doesn't matter which branch you move the data to - it is only important to know that the importer finds its configuration in the TypoScript template.