If you are in Norway now on a visitor’s visa, a visa free permit, or on a residency permit, and are not able to travel out of Norway before the expire date, you will not get any negative consequences.
This means that you will not be expelled because of this, even though your stay lasts longer than your visa or your residency permit.
It will not have any consequences for you if you want to apply for a visitor’s visa or residency permit again another time. You do not have to notify UDI or the police that you are not able to travel out of Norway within your time limit.
At the same time, it is still important that you try to get an exit out of Norway as soon as possible. There are still a lot of flights out of Norway, and many people manage to travel out, either as planned, or on another flight.