Happens 15 min ago. Any sugestion how to fix ?
Me too, can anyone help
There is a reddit post about this from 3 years ago where the same thing happened.
https://www.reddit.com/r/hearthstone/comments/umpojm/when_i_try_to_log_in_it_says_my_account_needs_to/
Some people fixed it by updating the client on all devices, but it seems like it needed an update from blizzard for most people.
Complete new installation fixed it for me