My cellphone screen went black and when I wanted to exit the system it said I couldn't enter my Facebook into the game.
Well, unfortunately you cannot connect to Facebook that easily, the only way at the moment is with the g-bo guide that it leaves on the first page, which you have to follow step by step to be able to connect to Facebook.
If it bothers you to do the steps, I recommend that you try it because you will not regret it. Many of us here didn't and started without logging into Facebook and then regretted it.