Doesn't let me sign in with the app. It's been annoyingly asking me to sign in almost every time I open it on desktop, phone, or tablet as of lately (upgrade to Mojave?). But now doesn't let me sign in at all... I even changed the password, at their request, still...
And it appears it is not because of the wrong password or that I initially forgot it. When I enter a wrong password, the message is different: