Hello NoobKing,
Unfortunately, it is not really practical for me to provide support for a wide range of versions of Minecraft. There was a version of the plugin available for Spigot 1.8, but it was horribly outdated and buggy, so I chose to remove it. If you wish to make use of Herobrine on your server, please upgrade to a newer Spigot release. As of this posting, the recommended version is
Herobrine v2.1.2 for Spigot 1.16.4.
Thank you,
David