The PowerShell Empire post-exploitation framework was discontinued by its original developers on July 31. The framework was forked more than 1,500 times and continued to be available for anyone who wanted to still try it out. Today, the security outfit published Empire 3.0 officially along with details about the changes introduced. The most notable modification is the conversion to Python 3 since support for version 2.7 ends on January 1, 2020. The new release is expected to follow a similar path.
Source: https://www.bleepingcomputer.com/news/security/resurrected-powershell-empire-framework-converted-to-python-3/