XQueue 403 Forbidden

After install of Open edx via https://bitnami.com/stack/edx/installer can’t access XQueue by domain:18040. As far as I understand from External Graders docs here https://edx.readthedocs.io/projects/open-edx-ca/en/latest/exercises_tools/external_graders.html it should.
Should it be set up additionally? If so, can you help with the steps that need to be made?
If no, then please leave any ideas if you expected similar issue or have something on your mind.