Here is the message posted in the Kylo Google Group:
Google Groups State of Kylo project matt.hutton
Feb 12, 2020 4:18 PM
Posted in group: Kylo Community
Teradata made the decision to discontinue Kylo in early 2019. Teradata
had been the sole sponsor of the open-source project and offered paid
corporate training, consulting services, and enterprise subscriptions
for support. The team was unable to immediately secure a new sponsor
and devs have moved on to other projects.
The last official release of Kylo was March 2019. The downloads of
the RPM and sandbox are no longer available but you may still build
the RPM (or TAR) from maven.