Ready to start problem

Try clearing the cache and then reinstall the game bro.
Put your finger on the start button of the console for 10 seconds until it goes out.
Then wait another 30 and turn it on again.
After trying this, reinstall the game.
It may work for you .

does it give you an error code?

Hi Bosstt,

Thanks for keeping us updated. When you get ready to start is this when a game is installing? We recommend to wait until the game is completely installed before launching the game. Also if you can please provide more details to the issue that's happening.
When exactly do you get the error? What error exactly are you getting? This additional information will help us assist you better.

Thanks,

Brad

You should try power cycling your console. Follow these steps: https://support.xbox.com/en-US/xbox-one/console/power-cycle-console

I would strongly suggest to do a power cycle and see if that can fix your issue.