I just saw this on the home page of the Questar Users Group (and that of another Yahoo Group that I'm a member of):
"Attention: Starting December 14, 2019 Yahoo Groups will no longer host user created content on its sites. New content can no longer be uploaded after October 28, 2019."
There's a link to learn more. It takes you to a page with text that reads, "Yahoo has made the decision to no longer allow users to upload content to the Yahoo Groups site. Beginning October 21, you won't be able to upload any more content to the site, and as of December 14 all previously posted content on the site will be permanently removed. You'll have until that date to save anything you've uploaded."
If you're a member of this group and want to save any content off of it onto your own computer, now is definitely the time.
It's a real shame, because there's a ton of collective wisdom about everything Questar related on that Yahoo Group.