I’d assume Whonix is a semi-popular DDOS attack target for spooks paid by your tax dollars to frustrate people trying to uphold their inalienable right to privacy. See:
Note that onion services are not immune either, which is why when whonix.org is non-responsive, so is kkkkkkkkkk63ava6.onion usually. See:
This seems to happen every few weeks. If it is a server-based issue, I’m sure @fortasse would know about it.