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]
(..) to control, all those things... - That people are speaking? - You already know... Parents, hypocrites, political, cretin... That is an error. It is an error to go so deep with those things. You are a very young boy, an impish young boy. But I can tell you, you are a youth, (..)2007 Into the Wild