Hello @sebeag, thank you for reaching out.

Have you tried to restore a save backup from the cloud saves?

We’d suggest that you first ensure that your save is stored on the XBOX cloud, before trying the following steps:

Reset the console cache by holding the power button for about 10 seconds until the console powers off, then disconnecting it from the power outlet for a couple of minutes, then try loading into your SP session.

If the issue persists, try to perform a soft factory reset while keeping games and apps.

Should you still have trouble loading into the SP game, please try to do a full reinstall of the game.

Did you also try to perform a full reinstall to ensure that there was no issue with the patching process?

Doing the factory reset keeping games and apps does not remove the game, it only resets firmware and settings for the console, as such we now suggest that you attempt to fully uninstall the game to clear all of its files and then installing it again, so that this time it downloads the latest version and help us determine if the issue could have been related to the patching process.

As recommended in a previous post, you should first ensure that your save is stored on the XBOX cloud before attempting the suggested steps.

That will allow you to download the backup of that save if necessary.