Yes there seems to be an issue with the syncing of data from your cloud to your Xbox locally. A few things to try. Log in and out of your Microsoft account on your Xbox as well on Microsoft’s website using the email or username associated with Xbox/microsoft. Then try and boot the sim.
Next you can try resetting the Xbox.
Settings > System > Console Info > Reset Console.
Choose the option Reset and keep my games & apps. I believe this is the same option has holding down the Xbox button for 10-20seconds to force a reset and restart.
The next option is a bit nuclear, but You can delete the saved data on your Xbox forcing it to sync with the cloud. This may delete your profile and activities progress so proceed with caution.
Settings > System > Storage Devices > Clear Local Saved Games
Hopefully these options work. I’ve also found this bug thread from last fall that describes the same issue. The topic author has said the only way they fixed their issue was to delete their profile and start again.