REST_FRAMEWORK = {
'EXCEPTION_HANDLER': 'my_project.my_app.utils.custom_exception_handler'
}

backend
    settings.py
    connectivity_service
        utils
            Custom404ErrorMessage.py

REST_FRAMEWORK = {
'EXCEPTION_HANDLER': 'backend.connectivity_service.utils.Custom404ErrorMessage'
}

ImportError: Could not import 'backend.connectivity_service.utils.Custom404ErrorMessage'
for API setting 'EXCEPTION_HANDLER'. ModuleNotFoundError: No module named
'backend.connectivity_service'.