Data Sync Issue with FM6

As soon as I start to load the game it stays on the “Syncing Data for Forza Motorsport 6” screen and the loading bar thing just seems to scroll across with no % showing for progress.

I have tried power cycling and even rebooting the router. I am using a wired connection.

Can someone tell me why it is having this issue please?

“Power cycle” doesn’t sound like you’re completing a full reset-reboot of the system. NOTE: If you’re part of the New Xbox One Experience beta, you’ll find this is a KNOWN ISSUE. Consult the beta forums, otherwise . . .

Try doing a system reset (hard boot) as below:
1 – from the Dashboard, out of all games, hold the X button on the front of the console down until it shuts the system down.
2 – Disconnect the external power from the wall plug (or at least disconnect the wall-side connector on the power pack itself.
3 – WAIT until all power drains from the external power pack (no light, either white or dull orange showing on the pack).
4 – Reconnect the power supply to the electrical outlet.
5 – Restart the console in the usual manner, i.e., either with the controller or a short push on the X button on the front of the X1.
6 – WAIT until the console self-checks and fully boots to the Dashboard before attempting anything.

If you don’t disconnect the external power pack and let the power completely drain out, the system is still retaining “old” stuff and not resetting. Once the syncing starts again, let it go for as long as it takes without interruption.