Is this your game or app?

This happens to me rarely with my own games as well. I believe it's just an error on Xbox's end and will fix itself eventually and recognize the game is yours. I've had to restart games after this and sometimes I would get that error a few more times,
sometimes it would stop and the game would start back up. If you're sure you own the game and you're playing it from your account, then hopfully this will go away and fix itself very soon. A hard reset, as mentioned in the other comment, won't hurt either.
Hold the white power button on the console down until the console turns off on its own, wait a minute (you can also unplug the console here), then turn it back on. Best of luck!

Hi,

Sorry about that issue, please try this > on the main menu of the console, press and HOLD 10 sec the powerbutton of the Xbox, wait 30 sec, restart.

Does it help ?

Hey
Master Shirow!

Thank you for letting us know that your issue has been fixed. We'll be locking the thread as the issue has been resolved. If you ever require any help with any other issues please feel free to come back to the Xbox Forums for further assistance. For those reading
this thread and if the troubleshooting steps didn't help resolve the issue, please feel free to create your own thread asking for assistance.

Thank you again, and have a great day!

It looks like it helped. Thanks.

Maybe is temporary glitch. If advices not work, check your internet connection and try to remove and add your account on box.