I can't believe how hard I tried to look this up and it was clear that I found alot of senario's but not the solution to my issue. if you are trying to connect a device wirelessly and you continue to see the unable to join network or unable to connect here is what I did that worked:
1. I went to my router login
2. I went to wireless devices
3. I added the device by name and mac address
4. I was connected...........YEAH.........I have spent hours trying to figure this out and wanted to share the information.