Hi Harald,
Looks like you have solved your configuration problem. That is good. I just wanted to add a note that currently the Report Feature widget works on dynamic map service layers and you would need to add them as operation layers. It doesn't work on Feature layers.
This limitation will be handled soon in another release of Report Feature widget. Regarding the other widgets, we are focused on releasing them soon. I can't provide a time frame at this point. But we are trying to get them out as soon as possible. Please let us know if you have any questions regarding the API and use ArcGIS Data Reviewer Server. Also let us know if you think the help document is not clear for setting up the widget.