https://www.spigotmc.org/resou…in-api-2-1-13-1-16.19672/
This plugin needs added because you have added another plugin of a heads that requires this api to even function correctly. The plugin question that requires this is https://www.spigotmc.org/resou…nventory-1-13-1-16.30167/
Without the api this plugin does not work.
Thanks aternos team if you can add this