A:Answer Yes - this is a common problem. I experienced the error after making configuration changes to my router (Netgear Nighthawk). My Airport Express no longer appeared on my network and the Airport Utility reported no AEs on my home network. So I went down the path of resetting (soft, hard and factory) the AE. Each time, I got this error. Interestingly the light on the AE was green, so I knew it was on the network, but just wasn't showing up on the Airport Utility or on my Apple TV (I use the AE for audio output for my projection screen). In the end, I reasoned that the router might be the problem because the AE was definitely configured correctly but was not being 'seen' on the home network. I restarted the router and a new IP address was assigned to the AE and it appeared on the Airport utility and on the Apple TV. Happiness.
