An Error is when something in a game malfunctions. Errors may also occur when you try to log in with the incorrect password or username. Usually, when an error happened in Club Penguin, an orange window would appear with an error message saying what the error is. In Club Penguin Island, a blue or red window will appear informing the issue and detailing the error, similarly to Club Penguin.
Each error message had its own code, shown at the bottom-right corner in small letters, which the Club Penguin Team could easily identify accordingly.