If you're running in this issue, try the following: Check if there are other wifi-capable client devices (laptops, tablets, phones, etc) that CAN see the Cradlepoint's wifi network.
Scenario 1: Just one device cannot see the wireless network, while others can.
The basic theory behind wireless technology is that signals can be carried by electromagnetic waves that are then transmitted to a signal receiver.
But to make two wireless devices understand each other, we need protocols for communication.
Many security problems can be traced back to the end user in wired networks.