Access to left and right cameras

Hi there!
Does anybody know how to get access to left and right cameras in code?
Locally this works correctly but I have got an error in inference stage when I make submission (IndexError: list index out of range).
Code to get access to cameras:

info, cameras = obs

front_image = cameras[0]
left_image = cameras[1]  # IndexError: list index out of range
right_image = cameras[2]

and also I changed config:

## in simulator config
active_sensors = [
        "CameraFrontRGB",
        "CameraLeftRGB",
        "CameraRightRGB",
    ]
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