Error 401 (OAuth2 Error)

After WordPress announced serious security flaws (http://www.theregister.co.uk/2014/11/24/worst_wordpress_hole_for_five_years_affects_86_of_sites/) we updated WordPress to the latest version.

This however, seems to have broken the Google Single-Sign On Auth and we now get an “Error 401 (OAuth2 Error) when trying to log on.

Here is a link to the error message: https://accounts.google.com/o/oauth2/auth?response_type=code&redirect_uri=http%3A%2F%2Fspinnotes.com%2Fwp-login.php&client_id=875636727868-33ud78m70q5o484emc6khjtev16tf7mn.apps.googleusercontent.com&scope=openid+email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile&access_type=online&approval_prompt=auto&state=46e71736c3%257Chttp%253A%252F%252Fspinnotes.com%252F

Is anyone able to help us get logged back into our site please?