Hi there! I understand that after installing Xumo boxes, your Fox Nation app on your Samsung TV won't load. Let's work together to get that sorted out.

To get started, can you tell me if the Fox Nation app was working fine on the Samsung TV before the Xumo box installation? Also, are you trying to access Fox Nation through the Samsung TV directly or via the Xumo box? This will help me narrow down the cause.

Meanwhile, here are some key steps we can try to troubleshoot:

1. Restart Your Devices
- Turn off and unplug your Samsung TV and the Xumo box from the power outlet.
- Wait about 30 seconds, then plug them back in and power them on. This can often clear any temporary glitches.

2. Check Your Internet Connection
- Ensure that both your Samsung TV and Xumo box have a stable internet connection. Sometimes poor connectivity can cause apps not to load.

3. Update Your Samsung TV Software
- On your Samsung TV, go to Settings > Support > Software Update and select Update Now to ensure your TV runs the latest version of its operating system.

4. Reinstall Fox Nation App on Samsung TV
- Navigate to the Apps menu on your Samsung TV.
- Find Fox Nation, uninstall it, and then reinstall it. This can fix app-specific issues.

5. Reset Smart Hub on Samsung TV
- Go to Settings > Support > Self Diagnosis > Reset Smart Hub—this resets your app data and settings, which may resolve conflicts triggered by the addition of Xumo.

6. If Accessing Fox Nation via Xumo Box
- Restart the Xumo box as above.
- If possible, clear the cache or reinstall the Fox Nation app within the Xumo interface.
- Confirm that the Xumo box itself is updated with the latest software.

Once you try these, let me know how it goes or if you've already tried any of these steps. If the problem persists, we can dig deeper into settings or potential compatibility issues.

Are you accessing Fox Nation directly from the TV or through the Xumo box? That info will help me tailor the next steps perfectly for your setup!