Where are you seeing this pop-up?
It seems to be gone now but after i logged in every time i clicked a link to any article the pop up would appear. Asking for username and password. Said something about authentication needed. I shut down and rebooted but the pop-up kept comimg back. Seems to have stopped now but I gotta say I was worried it was some kind of phishing hack.
Like user alex7926 posted below ,it had cms.seekingalpha written in the pop-up like the poster just below said.
Just confirming this is now resolved for everyone on this thread?
Customer support service by UserEcho