I was browsing through the question Favicon of Earth Science and Spanish are too similar (exactly the same in HNQ list) which got migrated from Earth Science Meta:
As you see, the link points to https://meta.earthscience.stackexchange.com/posts/1563/revisions, that is, to https://meta.earthscience.stackexchange.com:
https://meta.<sitename>.stackexchange.com. If you click on the link it returns a SSL error:
$ curl https://meta.earthscience.stackexchange.com/posts/1563/revisions curl: (51) SSL: no alternative certificate subject name matches target host name 'meta.earthscience.stackexchange.com'
This is because since Network-wide HTTPS: It's time, Meta sites have their URL on a different form, with the
meta subdomain after the site name:
https://<sitename>.meta.stackexchange.com. On this specific case, the correct path is https://earthscience.meta.stackexchange.com.
So the bug is that the migration link points to old URL of Meta, instead of the new one.