Hi JanIbrahim ,
My bad, I just now saw you are using the OAK-D-CM3. I have tried to reproduce; I flashed
POE-CM4-V9.img from here to the SD card, and booted OAK-D-CM3 from that uSD card. I tried running a simple example from depthai-python (rgb-mobilenet.py one) and it worked as expected. Could you try following the same steps, please?