You have six tries to guess the error message. With each guess, the color of the tiles will change, indicating how close you are to the correct word. If your guess is spot on, the tile turns green. If your guessed word is in the message but not in the correct spot, the tile turns yellow. If your guess is nowhere in the error message, the tile turns grey.
Remember, “…” is a wildcard that can represent any variable part of the message.