As of 10.2.31, DBM is no longer working for me (or for other people in my guild with the same version) in the Gnomeregan raid in WoW Classic Season of Discovery. There are no notifications at all. The mod seems to be enabled fine in the WoW UI. Previous versions still seem to work - people who haven't updated in a while aren't affected.

Ah, I think it was because of this change: https://github.com/DeadlyBossMods/DeadlyBossMods/wiki/%5BNews%5D-DBM-Module-Restructuring-and-unification so we need to download an additional mod now.
I'll close this for now unless it still doesn't work.