Re: [Tails-testers] Fwd: TAIL 3.13 upgrade issue

u:
>> W: An error occurred during the signature verification. The repository
>> is not updated and the previous index files will be used. GPG error:
>> tor+http://vwakviie2ienjx6t.onion/debian stretch Release: Signed file
>> isn't valid, got 'NODATA' (does the network require authentication?)

That's because Tails 3.13 (which is obsolete since a couple months
now) includes a version of the OpenPGP key for our APT repository
that's now expired. Please upgrade to the latest Tails :)