That seems to be a very unique error message. Google only finds your post with it. Probably it's not the full and litteral error message Windows gave you.
Anyway, https://www.google.com/search?q=windows+10+pin+not+available might contain a solution for you. Worth a try.
When Windows 10 insist that it cannot recognize my face it says I need to use my pin to log in but then he gives me this error message:
pin is not available due to changes in your security settings
I have reset my pin several times and I still get this error message
how do I fix this?