yum error -- cannot retrieve metalink on xo 12.1.0 build 21016o2.zd

[George Hunt]

Hi all,

On a XO-1.75 with a new install of  build 21016o2.zd:

"yum install mlocate" returns the error: cannot retrieve metalink for
repository fedora.

Issuing URLGRABBER_DEBUG=1 "yum check-update" returns  lots of stuff --
most interesting seems to be "remote certificate has expired" message.

Has anyone experienced, and dealt with this error?

George
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