This happened because your windows has run out of space.

If you get this error follow the below steps

Make sure you have 2 to 3GB of free space on your harddisk or ssd

  1. Go to start menu and search for "Services". Open it
  2. Scroll down to select "Storage Service"
  3. Right click "Storage Service" and select "Stop"
  4. Then right click again to select "Restart"
  5. Now open the xbox app and it should work.

Njoy :)