Erro "import RPi.GPIO" This module can only be run on a Raspberry Pi!

Hi

i have a raspberry pi 4 and i downloaded the image with ROS ( 2020-11-07). When I ran a python script that uses GPIO pins 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?