Update: Audio issues have resolved themselves, and I can now get audio to my headphones, after all the updating and restarting. Not going to dwell on this issue on this question, but these two might be connected. This is about the same time that whenever I plug in my headphone jack, I get no audio in my headphones (RealTek audio drivers), although the speakers seem to work just fine. However, for the past 2 weeks whenever I try to add a new Bluetooth device, this is what I see:
Till about a couple of weeks ago, I was able to connect as many devices as I wanted using Bluetooth (mice, headsets, keyboards), and there was no problem. I have an Asus Zenbook UX331FAL running Windows 10.