Active mouse keys prevents login

• The mouse keyboard on my Mac Book Air 2021 had suddenly been activated. It means that some of the Keyes - mouse keys - are inactive. I kan open and come to the login screen, but I am not able to login as I need to use some of the inactive keys. When I try to login I see a popup sign saying that mouse keys are active. How can deactivate the Mouse Keyes? There is no respond when I try to use kombination option-command-f5 nor start button.
• How can I come around this problem?

BR

Leif