This morning I went to turn on WiFi tethering (unlocked/TMO model) and it wouldn't turn on, just saying, "error" in the settings area. I rebooted - same finding. Then I noticed I can no longer turn WiFi on. Attempting to turn WiFi on does nothing. I've rebooted several times and checked recent app updates, but only Google Keep, CapOne, and Zedge have updated recently, and none control WiFi state. Has anyone seen anything like this?