Regnus, could you take a screenshot of the errors you’re getting?
Because I can confirm that the links are good.
Take a look at the screenshots I took of those parts below.
(Note the links in the images are redacted, but you already have them):
ESB Docs Part 12
ESB Docs Part 15
ESB Docs Part 26
Plus I periodically run mass link tests using http://urlchecker.org/, and it also confirms they are fine.