Admin password not working

Our NX installation auto-updated to version 5.1.1.37512 and since then the admin password doesn't work anymore. It was saved at the login prompt so i know for sure that the password was working before the update, and i did not changed it recently.

I'm able to login with cloud accounts, from where i can create a new local account for viewing internally.

Is there a wy to retrive or reset the admin password after the systems is auto updated?