MTFT: Invalid configuration value provided for “region”

I am trying to run the functional tests but it is returning an error:

$ /vendor/bin/codecept run functional -c dev/tests/acceptance/codeception.yml


Invalid configuration value provided for "region". Expected string, but got bool(false)  
                                                                                           
  region: (string)

I got some tips here on the MTFT github repository:

https://github.com/magento/magento2-functional-testing-framework/issues/821

But I have not been capable to fix it yet.

It is clearly related to AWS S3 bucket, but I have not configured it on my local.