error on 20.04 to 22.04

[Jerry Geis]

I am getting this ??

Get:51 http://us.archive.ubuntu.com/ubuntu focal-security/multiverse
Translation-en [5796 B]
Get:52 http://us.archive.ubuntu.com/ubuntu focal-security/multiverse amd64
c-n-f Metadata [548 B]
Fetched 547 MB in 1min 16s (7207 kB/s)
Reading package lists...
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [833 B]


Get:2 Upgrade tool [1268 B]


Fetched 2101 B in 0s (0 B/s)


authenticate 'jammy.tar.gz' against 'jammy.tar.gz.gpg'
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network
or with the server.
Reading package lists...
Building dependency tree...
Reading state information...


What do I do with that ?  The 20.04 is fully updated.

Jerry
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