Well, for about a minute… when all the guns in Second Life broke… Now, there are work around steps and viewer fixes and… Whatever, you can again shoot those deserving of annihilation.
So, what happened? Why can’t I shoot that scumbag werewolf and save the hot mini-skirted damsel? Seems the Lindens fixed a problem in the process of building Horizons, that’s my thinking. As they expanded controls for use with Advanced Experience Tools (AET), Horizons is an advanced experience, the scripting functions needed a bit more control. So, as reported some time ago we got new SIT commands. See: Second Life News 2016 w45 and for more details Scripting.
I suspect somewhere in that process the Lindens noticed some REALLY OLD bugs, think beginning of SL time, which are now just oddities for most scripters and fixed them to make it easier (and likely make it more logically correct) to do Horizons. The result is all the weapons designed to deal with those bugs/oddities broke.