Then you are allowed to speak about the problem.
Only the problem.
It is not allowed to speak again the next day when there is no problem.
You need to wait until there is another problem to speak again.
This is one of the 100 Unwritten Norwegian Social Laws presented in our new book "The 100 Unwritten Norwegian Social Laws"
Read more about our amazing Norwegian friends in our other Social Guidebooks to Norway written by Julien S. Bourrelle