Nighthawk X4 Wifi Mesh Extender AC2200 - Not able to connect to extender

[JCoca]

A couple of months ago my extender stopped working. 
I have reset the extender, connected to the router, all lights are green, but the extender network is still not an option to connect. I try to use the app and it will not allow me to stay logged in long enough to do anything. It continues to log me out and give me a timed out error when I try to log in again. I had to delete and reinstall the app. It worked for about 10 minutes and is doing the same thing. When I try to set up via a browser, the site says I need to update my firmware, but I can't do that if I can't log in and stay logged in.

[plemans]

1. what extender do you have? AC2200 is a speed, not a model 

2. what firmware version are you on? 

3. what router are you connecting it to? 

4.after the factory reset, did you try hardwiring a pc/laptop into it to go through setup? 

5. After setup, check the router for the extenders ip address. (should be in the routers connected devices page). Use its ip address to access it. Its a mesh extender so it won't show up as a separate network.