Issue with video streaming in Drone Engage

Hi everyone! I am having an issue with video streaming in Drone Engage. The telemetry of my Pixhawk board works perfectly fine but I can not get the video stream in the Webclient. I am using a standart camera for Raspberry Pi 4, it is connected to the camera port. Also, the Drone Engage software is creating temporary video files in the de_camera folder on my Raspberry Pi and I can see an image there. So it seems that the problem is not related with connection of the camera to the Raspberry Pi. Can anyone help me with this issue?