Error 800705b4 occurs when an Xbox app fails to launch after an update

You see the following error code when you try to start an Xbox app after updating it:

800705b4

This may mean that the application got corrupted through an app update.

Solution 1: Check the Xbox Live service status

If you see any alerts here, wait until the service is up and running and try again:

Solution 2: Delete and redownload the app

1. On the Home screen, move right and select My games & apps.
2. Highlight the app, and then press the Menu button  on your controller.
3. Select Manage app.
4. Select Uninstall all from the menu.
5. Press the Xbox button  to open the guide.
6. Select Settings.
7. Select Restart console.
8. After your console restarts, redownload the app and try launching it again.