Kopano WebMeetings 3.0.3 has just been uploaded to the pre-final directory.
This is a minor release which (apart from clarifying license texts) mainly adds a fix for the build process, which ultimately prevented the plugin from being released earlier.
Have a look at the changelog at https://documentation.kopano.io/kopano_changelog/kwp.html
Packages will be pushed to the final directly by the end of the week.