This includes an error message in the app, writes Göteborgs posten.
Customers throughout the Nordic region must be affected.
- We have problems with logging in in all the Nordic countries.
But not everyone is faced with the technical problems, some customers can log in, others can not, says the bank's press officer Javier Lopez, to the newspaper.
The technical problems only concern the new internet bank and Nordea's mobile app.
There is currently no forecast for when the problem may be resolved.