After digging around a bit, I came across this article from back in March: https://www.tv2.no/sport/ma-kutte-i...-lokaler-som-er-seks-ganger-sa-dyre/16527858/They are not part of the 24 confirmed teams on the Avenir website and already saw someone mentioning their absence on twitter earlier today.
EDIT: apparently "no money".
Where it's already mentioned that they won't send teams to l'Avenir or the European championships. This because the cycling association has moved into new and shiny offices next to the new velodrome in Asker, with more than six times more expensive rent than the previous headquarters.