When I try to use a Google account to authenticate to a StackExchange account, something strange happens -- On clicking the "Log in with Google" button with Google unauthenticated, the sign in to google completes fine but instead of getting redirected to the page before login, this appears on the screen and I can't login. Refreshing the page doesn't change it either.
The message reads:
Request lacked state, may have been forged
But with Google already authenticated before clicking the
Log In button, login to SE works as expected.