At 12:29 of the second period in the Predators/Sabres game, Buffalo requested a Coach's Challenge to review whether Mike Fisher interfered with Sabres goaltender Linus Ullmark prior to their goal.

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed no goaltender interference infractions occurred.
Therefore the original call stands - good goal Nashville Predators.
Since the Coach's Challenge did not result in the original call being overturned, the Buffalo Sabres forfeit their time-out.