Ahh – I was logged in as wrong user!! sorted
I found same problem – turned out to work after disabling simple calendar plugin which was also authenticating with google.
Not sure how to have both running at the same time….
Thanks jdrivard, solved my problem….
I got exactly the same error. Traced it to a conflict with the simple calendar plugin, which accesses a google account for retrieving calendar information. I guess its something to do with the two google authentications going on at the same time. It looks like Yoast seo may present the same conflict, so I’d check your plugins and suspect other ones that interact with google if I were you …..