We have an MVC project using OWIN Framework to allow our users to authenticate using Twitter.
However starting today, we have been getting this exception when trying to authenticate:
System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
Can you please advise if there has been any certificate changes recently? and if so, what is the impact on the Twitter API calls?
Also please advise of the method to resolve this issue in our application.