By default, Herobrine does not attack server OPs, which I assume you are given that you are the server owner. To disable it for yourself, you have two options:
- Set the "UseIgnorePermission" configuration option in the config file to false. This will disable the hb-ai.ignore permission for all users and Herobrine will be able to attack everyone.
- If you want to use the hb-ai.ignore permission for certain users, but not yourself, you must use a third-party permissions plugin to set the hb-ai.ignore permission for your user to false.
The first option is easier, while the second one will give you the ability to more finely control what users can and cannot be attacked by Herobrine. If you are not sure which option you should pick, then I would recommend going for option 1.