No problem adding to Tab as “website”. Seems to only work with Apps that are public but not for apps that “Require User Signin”. Got a " accounts.google.com refused to connect." message after selecting Google Account in the oAuth authentication scree...

We had the same problem for the past 2 days and this morning too (UTC+8). However, the problem seems to have gone away since 30 mins ago. Looks like it’s back to norm now. Any idea what is the cause and is there something in our Apps that we need to ...