The problem with import of data from Enhetsregisteret (The Brønnøysund Register Centre) is now resolved, and the registration system has updated data.
The import is back to normal operation, which means that new data from Enhetsregisteret is imported every hour.
The problem was caused by an error in The Brønnøysund Register Centre API-service. More information can be found in the news article published by The Brønnøysund Register Centre (in Norwegian only).