By its very nature, the World Wide Web (WWW) is a very chaotic place.
You just wanted to follow a link to a page on an other site that did
not work the last time it was checked
automatically or manually.
(As I am not the maintainer of that other site, I cannot do
anything about the page not being accessible.) Links which
appear to be broken on one day, may be working again the next
day.
If the link is really broken, and you know the new location of
the page, please let me know, then I can fix the problem. My
email address is:
The section External link
checking on my page about site maintenance explains
how I check for broken links.