My son has a family-link managed google account and gets this message now for this past few weeks when trying to login into Scoutbook from a browser. Interestingly, it appears that the Scouting app still works, but that may be cached credentials. This is consistent across browsers. Sometimes when logging in the Google icon doesn’t even show up as an option when trying to authenticate. Does this have anything to do with the change earlier this month that enabled me to login without having to click the login button?
Brett