Here is what you can do to troubleshoot the Netflix app on your Smart TV:

1. Check the Internet Connection: Test whether the internet connection is working properly and ensure that it is connected to the device.
2. Reinstall the App: If the app does not open, then uninstall it and reinstall the latest version from the respective app store.
3. Restart the TV: Shut down the device, wait for a few minutes and then power it back on so that the device can receive the latest updates.
4. Update the TV: Watch for the latest software updates available for the device and install them if Found.
5. Reach Out to the Network: If the above measures do not work, then look for ways to connect with the cable provider and report any inconsistencies in the network.