Is it forbidden to stop vehicles in this place?

In the photo, you are driving through a lit tunnel with a pavement on the right, and another car is coming from deeper inside it. In a tunnel, stopping vehicles is prohibited, regardless of whether it is lit and whether it has a pavement. The answer is: yes.

The Road Traffic Act prohibits stopping a vehicle in a tunnel, on a bridge or on a flyover (viaduct). A stopped car blocks the lane, which in a tunnel cannot be driven around using the shoulder, and in the event of a fire it makes evacuation and access for the emergency services more difficult. If your vehicle comes to a standstill in a tunnel because of a breakdown, you switch on the hazard warning lights, place the warning triangle and move the car to the nearest emergency lay-by or out of the tunnel, and you lead the passengers to an emergency exit.

Legal basis: Art. 49 para. 1 point 3 of the Road Traffic Act (Prawo o ruchu drogowym)