Prober Logs shows Invalid SSL certificate

[DevPGSV]

Hello,

Our mirror:
https://launchpad.net/ubuntu/+mirror/mirror.librelabucm.org-archive
Is marked as Official, but it is not listed as available at:
https://launchpad.net/ubuntu/+archivemirrors

In the Prober Logs we see lines like:

Sun Nov 27 21:57:39 2022: Deleted MirrorDistroArchSeries of ubuntu lunar
arm64 main with url
https://mirror.librelabucm.org/ubuntu/dists/lunar/main/binary-arm64/Packages.gz
because: Invalid SSL certificate when trying to probe
mirror.librelabucm.org:443.

We see this problem has been happening in all the Prober Logs for a long
time, but our SSL Certificate is (and has been) valid.
Is there any way to fix this?
We have just set up a CD Image mirror (we are currently at Pending review)
and the same error might happen too.

Thank you,
Pablo
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