16-3 errors can be caused by attempting to view recordings on multiple devices simultaneously.
Remember, you can only play back recordings from your AirTV on one device at a time. Stop playback on one device to continue watching on another.
Still having issues? Try the steps below to resolve the error:
Turn the AirTV device off, then turn it back on.
Open the Sling app on a mobile device or tablet and go to Settings > Over The Air Channels > Remove AirTV. After removing the AirTV, select Set Up AirTV to reconnect the device to your account.
If you're still receiving this error after attempting the steps above, please connect with AirTV at 866-974-1354.