The first release candidate version of Joomla! 4 has been released on June 13, 2021. The RC4 is aimed at extension and template developers to encourage them to work with this release in order to prepare extensions for the stable release of Joomla! v.4.0.

The official announcement about this Joomla! release is here.

Today, we are more than happy to announce first preview for ui/Theme-Builder for Joomla 4 Beta 7.