I received an invite from a friend to join his party while I was playing a single player game. I accepted the invite and everything seemed to be working great. Then I get the message, sorry COD: Ghosts took too long to start. Not sure how it took to long to start considering I was already playing the game. I then was taken back to the home screen where I was prompted with the option to buy COD: Ghosts from the Xbox Store because the OS didn't see that I had the game disc in the disc drive, with it already installed. The last time this error showed up, my hard drive locked up and I had a broken Xbox One. Luckily, my first two broken ones were within 24 hrs and I returned them Gamestop to get a third new Xbox One. Powering off and on seemed to work but this is ridiculous that the OS(or COD software) can't transition from single player mode to multiplayer mode within the same game. Not to mention it somehow couldn't find my license and prompted me to buy the software again from the store even though the disc was already in the drive. So happy I spent $600 on a broken product and it's not getting better like the wonderful promise Microsoft has stated.