Version 2.1.1 is now available. It includes a number of minor bug fixes, including improvements to indexing and the public interface, as well as to the OAI-PMH functionality. You can review the release notes here: https://github.com/archivesspace/archivesspace/releases/tag/v2.1.1
Please let me know if you would like to update your Atlas-hosted server to the new version by either replying here or contacting me at firstname.lastname@example.org.
Anne Marie Lyons