Mailing list looks abandoned and there is a notice from Yahoo:
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. Sending/Receiving email functionality is not going away, you can continue to communicate via any email client with your group members.
I suggest directing users to the Gitter room instead.
Mailing list looks abandoned and there is a notice from Yahoo:
I suggest directing users to the Gitter room instead.