Hi G. Gonter,
Apparently there was an issue with the multistream one (although I am quite sure that I had problems with the "other one" myself, twice).
You are the second (maybe third) person to report that could decompress it OK, so it possibly was a problem with my machine. I don't even have any logs in there to see which of the files was the problem (the relevant volumes have been formatted and I won't bother to try recover that).
Thanks for your efforts on this, for more, please see https://phabricator.wikimedia.org/T121348