The company has admitted that it made an 'error in judgment' [=a poor decision] in trying to expand too quickly.
The computer displayed an 'error message'. [=a message indicating that an error has occurred]
The project was a 'comedy of errors'. [=there were many errors made throughout the project]
(..) Exactly. As you know, you are believed to be Poseidon's only heir. Yeah, so? So, it would seem that belief has been held in error. Hold on. You're saying Percy has a brother? Or a sister. Holy Styx. Another Poseidon half-blood. Not exactly. (..)2013 Percy Jackson: Sea of Monsters