Yes, that is because the provided zip file (from oekobadat.de) does not contain these flows (and some other elements), and is thus incomplete. When you open the ILCD file, you see the URLs to e.g. flows in the 'flows' subfolder, and openLCA is looking for these flows there, and they are not present in the zip package. There is some discussion (with Sphera) that these flows etc. are not needed because they are anyhow in the GaBi software, but the zip archive itself is incomplete, and openLCA expects it to be complete (which I think makes sense).
We will have a much nicer way to handle EPD datasets in openLCA 2, where EPD and calculation result are new objects.