It means that you tablet can't authenticate with whatever WiFi source you're trying to connect to.
Wrong protocol, wrong password.....
I took the easy way after messing with it for an hour. Go down to Forget. Hitting that should remove that WiFi and allow you to begin again. Works like a charm. Quick and easy. Good luck. P'S .. I also wasn't able to get help on here. Too many questions and not enough resolutions