IIS 7 Error “A specified logon session does not exist. It may already have been terminated.” when using https

Question

I am trying to create Client Certificates Authentication for my asp.net Website.

In order to create client certificates, I need to create a Certificate Authority first:<

Answer 1

We had the same issue due to incorrectly importing the certificate into the Current User Personal certificate store. Removing it from the Current User Personal store and importing it into the Local Machine Personal certificate store solved the problem.