Java 17.
WorldGuard 7.0.5 or above.
Spigot 1.20 (I recommend Paper).
Installation:
Be sure you have installed correctly WorldGuard plugin.
First, drag and drop hhittremover.jar at your server plugins forlder.
Secondly, set the flag "hhitt-remover" allow in the regions of the world that you want the plugin works.
Finally, configurate the plugin.