Appstore rejected due to System Configuration Reachability API

I developed my app for iOS using Adobe Flash CC with AIR SDK 18.0 running on Windows 7. My app does not require nor communicate with the internet/network data to work.

Unfortunately, my binary is rejected by Apple due to:

"During review, we found that your app does not load its contents and stays blank when the device is connected to a cellular network or Wi-Fi network.

Please review the Reachability iPhone program code sample that demonstrates the use of the System Configuration Reachability API to detect the absence of Wi-Fi and Wireless Wide Area Network (WWAN) services. Your app can then take appropriate action at the first point where network services are required."

Apple took a screenshot of my app, which showed a black screen.

I have tested the app on personal iPhone 5 (on airplane mode and with wifi/data turned on) without issues; at this point, I'm not sure what's causing the error or how to go about fixing it. Any help would be appreciated.