Polaroid M11 wifi authentication problem - Polaroid Tablets & eReaders

Try it near your router when connecting to WiFi

Reads like you've got a faulty wifi module on the Nexus. Have you got warranty?

Try it with a different router. Use a friends. Your router may have to be adjusted.
Go on the manufacturers web site and see if your problem is listed.

Does the WiFI have a MAC filter set up? If so then add your tablet's MAC to it.

Hi
To connect to a WiFi system, you may need 3 pieces of information:
A username
A password
An encryption key
Once you have successfully linked to a WiFi access point then your tablet will remember the settings until told to forget them.
A lot of the time you may only need the encryption key, and if the tablet detects a WiFi access point then if you tap on that in wireless settings then it will either connect automatically or ask you for some sort of code - the encryption key. If this is not entered correctly then it will return an authentication problem/error. In order to connect you have to have this code.
Cheers

You likely have a setting to turn on WiFi. This option is to save your battery, as WiFi drains your battery if it is on continuously. If it is turned off, you will never receive a WiFi signal.

trying dumbing down the authentication on your wifi router. Try these:
turn off 40mhz wide channels
try wpa instead of wpa2
try tkip instead of aes

if all else fails, try wep.

Here is the remedy for that error:
We've heard a few reports of Wifi connectivity issues recently, among them 'Authentication error'. If you receive this message, our recommended remedy is to remove all Wifi connection information from your Meep, turn off your Meep, reboot your router, then turn on your Meep and re-add the Wifi information. Follow these steps exactly in this order to resolve this error message:
1. Remove all Wifi network information from the Meep's settings
2. Reboot your router
3. Re-add the Wifi network information to the Meep's settings
4. Reboot the Meep.

Maybe try going to the router settings and changing the security settings. See if turning off wifi password solves the problem then turn it back on.

Can't get unit to connect to my home wifi , keeps giving message Authentication Problem