Abandoned Game?
You likely got disconnected from the live server process.
There are some things you can do to minimize connection issues.
https://support.chess.com/en/articles/8584209-how-do-i-fix-my-disconnect-lag-issues
https://support.chess.com/en/articles/8652402-how-can-i-optimize-my-online-chess-performance
If you need help, please contact our Help and Support team.