Need help for running the RoboticsAcademy exercises locally

[Arcane-01]

I followed the Instructions for developers. However, when I tried to open the Position Control exercise I encountered the following error. I've encountered similar errors with a few other exercises. Could I have possibly missed a step or misconfigured something during the setup process?

Traceback (most recent call last):
  File "/home/arcane/env/lib/python3.8/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/home/arcane/env/lib/python3.8/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/arcane/RoboticsAcademy/exercises/views.py", line 87, in load_exercise
    return render(request, 'exercises/' + exercise_id + '/exercise.html', exercise.context)
  File "/home/arcane/RoboticsAcademy/exercises/models.py", line 140, in context
    if len(launch_files_dict[ros_version]) == len(exercise_configuration[ros_version]):
KeyError: 'ROS2'

[Arcane-01]

Fixed it by following the updated developer instructions and using Docker Compose.