The most bizarre reasons for the cancellations are emerging. Of course the pilots are at fault if you ask Norwegian:
Norwegian om flykaoset: Piloter har meldt seg syke på kort varsel - Norwegian Air Shuttle - VG
"The pilots have declared sick with short notice"
https://www.nrk.no/rogaland/parat-be...ian-1.13025136
"The pilot union have cancelled the proposed agreement regarding overtime work"
Or, from a Swedish newspaper:
Norwegian ställer in flygningar ? ?strategi? enligt facket - DN.SE
"Shortage of pilots and planes"
Meanwhile no information has been relayed to the passengers, some of them got the news at the airport!
Raser mot Norwegian: ? Bjørn Kjos ligger vel under en palme et sted - Norwegian Air Shuttle - VG