The Duden defines Fehlerkultur as an open and constructive way of dealing with mistakes. The Duden examples show how the word is used. People speak of developing a Fehlerkultur in a company or a party. They complain that a Fehlerkultur has been lost, and they want to revive it. The oldest example shown in the DWDS dictionary comes from Die Welt in 2000: wir brauchen also eine andere Fehlerkultur beim Lernen, so we need a different error culture in learning.