error "import RPi.GPIO" with image ROS from Ubiquity Robotics

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Hi I downloaded the image (2020-11-07) with ROS for raspberry pi 4 from the website: https://downloads.ubiquityrobotics.co.... When I ran a python script I got the following message:

Traceback (most recent call last):
   File "/home/ubuntu/catkin_ws/src/auto_docking/scripts/autoDocking.py", line 14, in <module>
     import RPi.GPIO as GPIO
   File "/usr/lib/python2.7/dist-packages/RPi/GPIO/__init__.py", line 23, in <module>
     from RPi._GPIO import *
RuntimeError: This module can only be run on a Raspberry Pi!

Does anyone have any suggestions?