I was running 3 for the longest time, and it appears that A LOT has changed in 4, at least behind the sceens.
I don't fully understand the notify portion of the settings gui, but if i enable notify for memebers and enable autoinv and announce, THEN add members, massinv, etc work.
If I add members first, then play with settings, it appears that massinv, etc do not work, even if turned on and off 50 times.
So I got it working by configuring the bot first, then adding members.