Ok the easiest way will be the following:

1. Open the Terminal
2. Type the following (all in one line): /opt/organiserfee/bin/organiserfeedd 2>&1 | tee ~/MyDocs/Documents/debug.txt
3. Start it via Enter
4. Open or restart the documents application
5. Send the debug.txt file visible in the Documents application to me (organiserfeed at bithub.de). It only contains calendar names and event start and end times - no event titles or descriptions are included.

Let me know if you're having problems with any of these steps. Thanks