One day nrfutil suddenly stopped working... why?

I have been using Python 3.9. When the problem occurred, I installed Python 3.10, but the latest version of nrfutil was not available. (And I still got the same error).
After repeating this process many times, I am now on Python 3.8, but the error is still there.

I have been using Python 3.9. When the problem occurred, I installed Python 3.10, but the latest version of nrfutil was not available. (And I still got the same error).
After repeating this process many times, I am now on Python 3.8, but the error is still there.

Strangely enough, only nrfutil(.exe) doesn't work... The script (nrfutil-script.py) works of course.

Just to be clear, you did not install a new python version when the issue occurred, but you tried installing different version later to resolve the issue?

Have you tried force reinstalling nrfutil? (Make sure to backup any required files in the python modules)

pip install nrfutil --force-reinstall