As part of the release notes for Jamf Pro 10.28, there is this note in the Deprecations and Removals section:

Support ending for the Jamf Pro Server Installer for macOS — Support for using the Jamf Pro Installer for macOS will be discontinued in a future release. Mac computers with Apple silicon are not supported by the Jamf Pro Installer for macOS. If you want to migrate your Jamf Pro server from macOS to Jamf Cloud, contact Jamf Support. If you want to keep your server on premise, you can migrate your Jamf Pro server from macOS to one of the following servers: Red Hat Enterprise Linux, Ubuntu, or Windows. For more information, see the Migrating to Another Server Knowledge Base article.

For those folks who are running on-premise Jamf Pro servers on Macs, it looks like it’s time to contact Jamf Support and plan a migration if you haven’t already. As of March 17th, 2021, Jamf’s published support for running Jamf Pro includes the following OS, database and Java versions: