This is only relevant for those people who read or post in that newsgroup using Google Groups.
Google will discontinue Groups in Feb 2024.
For those who do not know Usenet:
Usenet is a distributed communication system consisting of many servers. Google Groups is only one of them that closes down - other servers will stay available, but people need to use another server to read and post here.
You need to use an NNTP server with a so called newsreader.
As an NNTP server, some free services exist where you have to register:
Some examples are:
For most servers, authentication must be enforced in the newsreader's settings.
For Thunderbird, a tutorial is available here: