Seems like there's ongoing issues with North American server right now. Players are unable to connect into the games and being stuck in a ghost games as well.
Riot is aware of the issue and works hard in order to fix it within a reasonable matter of time.
Many players are experiencing this, so don't worry, it's not an issue in your account.
Stay away from playing ranked games for now, until this issue is fully fixed, please.
There's no ETA on fix yet, unfortunately and it's yet to be determined if there's gonna be a compensation. Please be patient and thanks for understanding! :)
***UPDATE***: Issue with ghost games should get fixed in about 2-3 hours and you'll be able to play again.
Sorry for the inconvenience.