I understand what you want to ask and what you want to have.
No, there is no free open source Windows login as in free beer. You can not get everything in an easy way without effort and without any money.
You can find the free open source privacyIDEA Credential Provider as in free speech at github. Just as with free speech, it gives you a greater responsibility, a bigger need to think to use your free speech wisely. In total contrast to consuming free beer.
You need to understand how your system works. If you want to manage a 2FA system, no matter which one, you need a basic understanding.
Your post about wrong OTP values is totally at the wrong place. I have the impression you read “wrong OTP value” and jump at it.
Use the means of a system to investigate your problem. Others are not there to ease your life and guess the solution of your problem.
The new version of the credential provider has nothing to do with you getting a wrong OTP value.
Take a look at your audit log. Take a look yourself - do not paste it here!
Take a look at the log file. Do not paste it here!