boss plugin error

i downloaded a boss plugin from poggit but when i hit the boss it crashes my server, im pretty sure the dev of the plugin has gone inactive and i dont know how to code could someone fix it? i can send you the error

https://poggit.pmmp.io/ci/JGYTVevo/BossJG/BossJG

 

Yeah, please tell us what error you get. Maybe I can make an attempt to fix it.

 

rip the picture doesnt work https://m.imgur.com/gallery/YgqZArh

 

Okay, I think I made it work. If the file doesn't work please tell me and I'll try to see what's wrong.
You can look at the source code right here: https://github.com/Mohagames205/BossJG

The plugin broke because of a change in the protocol. You can read about the change on this page: https://github.com/pmmp/PocketMine-MP/blob/stable/changelogs/3.9.md

Have fun with the plugin

 

thanks ill try it now

 

it works thank you theres just a weird bug where if you hit the boss he goes into the air instead of staying on the floor