Documentation Help: links to "Conditional expressions" don't work

#1
In the help for IF, IFF, @IF, DO (maybe elsewhere) clicking on the highlighted "conditional expressions" results in

This page can’t be displayed
  • Make sure the web address //ieframe.dll/dnserrordiagoff.htm# is correct.
Numerous other links on those pages ("command separator", "command group", "duplicate CMD bugs", ...) do the same thing.