Are you allowed to enter the intersection in this situation?

Why?

The police officer is facing you with both arms extended sideways, which means you must not enter the junction. The direction of the officer’s torso determines the signal, not where they are looking. Instructions from a person directing traffic take precedence over traffic lights and road signs.

§ 108 ust. 3 rozporządzenia w sprawie znaków i sygnałów drogowych; art. 5 ust. 2 Prawa o ruchu drogowym