The current recommended version of the software for mainnet is [v0.15.1](https://github.com/Kava-Labs/kava/releases/tag/v0.15.1). The master branch of this repository often contains considerable development work since the last mainnet release and is __not__ runnable on mainnet.
The scheduled mainnet upgrade to `kava-8` took place on August 30th, 2021 at 15:00 UTC. The current version of Kava for `kava-8` is [__v0.15.1__](https://github.com/Kava-Labs/kava/releases/tag/v0.15.1).