At 15:49 of the second period in the Panthers/Rangers game, New York requested a Coach's Challenge to review the "Interference on the Goalkeeper" decision that resulted in a "no goal" call.

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed that New York's Rick Nash made incidental contact with Florida goaltender James Reimer before the puck crossed the goal line, preventing Reimer from doing his job in the crease.
Therefore the original call stands - no goal New York Rangers.
Since the Coach's Challenge did not result in the original call being overturned, the Rangers forfeit their time-out.