Runtime Error: Unable to open camera

[KnechtNoobrecht]

from jetcam.csi_camera import CSICamera

try:
    camera = CSICamera(width=224, height=224, capture_width=1080, capture_height=720, capture_fps=30)
except RuntimeError as e:
    print(e)
    

while True:
    image = camera.read()
    print(len(image))

The code above throws an error: Could not initialize camera. Please see error trace.
However camera output works using nvgstcapture.
OpenCV and [email protected] and [email protected] are installed.