This update fixes plugins for us with Data API on Windows. Also it fixed installation trouble for Linux and macOS.
Please read the release notes for more details on bug fixes and the new AuthenticatedStream setting.
Announcement in the community: Claris FileMaker Server 19.3.2 is now available.
FileMaker Server 19.3.2 Release Notes
Enabling plug-ins for FileMaker Data API in FileMaker Server
To download the new version, you may use the download page for your licensed software (see your license email for a link) or use the in-product updater next week.