Fortnite 2 monitors duplierziert?

If I start fortnite (pc), the screen is halfway duplicated and the mouse disappears with halfway I mean that I have the normal picture but the 2nd monitor is half covered with the picture I can also do only mouse actions in the faulty field it is a still picture and i do not see the mouse.
My question is how can I fix this.

Press Windows key + P and try to press expand.

I meant Windows key + P

Thank you but have solved it yourself and the drivers reinstalled I forgot to write here anyway thank you