The future is not evenly distributed.

I tried to search for it, but even the 2 documents that superseded the one from around the time my daughter was at school at not available.

I mean, the site doesn't even have a valid secure certificate so...

In the site below (In Spanish) you can search for 10/2019 and a cursory translation of the document title will show that this is the proper document (For 2019 onwards, the replaced doc 04/2014 isn't available either)

https://koha.chubut.edu.ar/cgi-bin/koha/opac-search.pl?idx=k...