On this page: https://www.akeebabackup.com/documentation/admin-tools/getting-started.html
Several of the links near the top, and possibly entirely down the page, do a relative link from the root and not /documentation/admin-tools.
When you click on them, like the "administrator password protection", it goes here:
http://www.akeebabackup.com/admin-pw-protection
instead of
https://www.akeebabackup.com/documentation/admin-tools/admin-pw-protection
I'm not sure if you recently updated them or not, so sorry if I am reporting something that has already been reported before. It's kind of a hard thing to search on in the support area.