Internal issue, not sure how to report this to Checkmk since I use cre.
So maybe remove this topic when read and solved by staff.
Looks like the redirect for https://docs.checkmk.com/2.0.0/en
, link from inside monitoring Help > External > Userguide (on 2.0.0p16 cre), changed this week to https://docs.checkmk.com/latest/en/en
, which obviously does not exist and gives a 404.
Last week it was still redirecting to https://docs.checkmk.com/latest/en/
.