Owin Twitter login - the remote certificate is invalid according to the validation procedure

Question

I started getting this error recently when trying to login using twitter- any idea why?

Stack Trace: 


[AuthenticationException: The remote certificate is i         


        

Answer 1

Turn off Fiddler.

Somehow Fiddler web debugger messes up the Oauth for Twitter.

Answer 2

For testing purposes only (!) it is also possible to set the

options.BackchannelCertificateValidator = null;

and add to your Global.asax Application_Start:

ServicePointManager.ServerCertificateValidationCallback = delegate 
{ 
    return true; 
};