When you go onto Airbnb from your computer, do you not see "Switch to hosting" or your equivalent in Norwegian? You may have to log in but normally you're redirected to the main hosting page that shows us our forthcoming reservations, past reservations etc
Oh dear @Terje29 - time to give customer service a call maybe or try changing browser and deleting all the caches? Are you using a Mac by any chance? I have found that I have a better Airbnb experience using Chrome rather than Safari lately.