A few options present themselves:

- We could switch to AFL 3.0 (https://opensource.org/licenses/AFL-3.0). This will require some review by our lawyer.

- We could link to another copy of AFL 2.1. Honestly the original one seems pretty odd.

- We could link to the archive.org copy of AFL 2.1.

But looking at archive.org I find this copy:

https://web.archive.org/web/20170827133353/https://www.samurajdata.se/opensource/mirror/licenses/afl-2.1.php

which has the following text, in red, at the top:

Larry Rosen has ceased to use or recommend any version of the Academic Free License below version 2.1

(Note that Larry Rosen is the AFL's author.)

So maybe the first option, get a legal opinion on switching to AFL 3.0, is our best recourse.