New camera stack - "server error" message

Camera model

C270

What is the problem?

No matter what I do (edit usb-default.conf, update system, restart services) there is no image and "server error" message is displayed

What did you already try to solve it?

Clean install of the newst image, updating whole system AND relevant packages to newst available versions, editing .conf files.
Camera is properly detected by the OS, settings are all ok, but there is no image.
my usb-default.conf looks like that:

Options for USB based cameras

The port on which the webcam server for the camera should listen on. If you have only

one camera, leave at 8080. If you have more, change to 8081, 8082, etc. The primary

camera will be considered the one with 8080.

PORT=8080

The path to the camera device. Leave as is if you are using no or only one USB camera.

DEVICE=/dev/v4l/by-id/usb-*-video-index0

The image format of the camera.

FORMAT=MJPEG (also tried JPEG and YVUV)

The resolution to set on the camera. Defaults to 1280x720.

WIDTH=1280
HEIGHT=720

The framerate to set on the camera. Defaults to 15fps.

FRAMERATE=30 (also tried 10 and 15)

NBUFS=10 (tried 2 and disabled)

Additional options.

OPTIONS=--http-listen=0.0.0.0 (also tried without this line)

Have you tried running in safe mode?

YES

Did running in safe mode solve the problem?

NO

Systeminfo Bundle

You can download this in OctoPrint's System Information dialog ... no bundle, no support!)

octoprint-systeminfo-20240827014222.zip (50.5 KB)

Additional information about your setup

OctoPrint version, OctoPi version, printer, firmware, browser, operating system, ... as much data as possible

WRITE HERE