Can't log in on square account pS4

[tsviet]

HI i'm having a problem

I could play normally until juts a few days ago, right now when i access the game on my ps4 the sign in for the square account box is gone!! its been 3 days, everything is on ( the newsfeed and all) but there is no box in which i can't put my user and password for square enix account... only a black space

i thought of a psn down server or maintenance but it seems there is nothing wrong with them!! i have the latest update of the game and sincerely don't know what to do!!

for better explanation this is what is happening