16-537 errors can be caused by attempting to delete a recording when the AirTV is already busy.
Before troubleshooting, wait a few seconds and then try again. AirTV devices can take a few seconds to finish a requested operation.
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.