Using Nuki Lock 3.0 Fully Local without Bridge

You need to be more specific when asking questions. Here read this:

https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question

Then, think that people are not at your computer and don’t know what you did, tried, which addon or integration threw that error or why.

You need to explain the scenario, the steps you followed, at what step did this error appear and what have you tried to solve it. Then we may be able to help you, but throwing some log messages won’t give enough information.

You also said in a previous comment that you successfully paired the lock and got the lock key. Is this error after pairing? Before finishing the addon installation?