I have the same issue and since the manufacturer of the device I am trying to connect is Apple (in addition to any other manufacturer of any wifi capable devices that will also not connect) , I will go ahead and post here as well.
This just started happening suddenly. I'm on 8.1.2 and Nothing will connect. I see the blue bar at the top appear and disappear 2 or 3 times and the connection just fails. There are other threads on this topic as well. I have tried:
- Reset network settings
- Rename the device and therefore the hotspot
- Hotspot password change
- Forgetting the network on connecting devices
- Etc.
I would greatly appreciate some insight here. The troubleshooting steps in the link above do not work. The only thing I have yet to try is a full restore which I would prefer to avoid if possible.