this is happening for a few days now, the thread on US forum has over 41 pages. One dude even found a blank login page that is probably the cause
some people reported that login only works on iphones and samsung phones, if you have other brand you are screwed...
there doesn't seem to be an activity from samsung to fix this ridiculous issue
They aren't trying to do anything. I have spent almost a week in these forums, and see NOTHING being done. HOWEVER! Samsung DID take the time to ban me from support forums after I "colourfully" expressed my opinons