i've spent hours looking at the tutorials on the apex hosting website, but i still haven't been able to download herobrine to my minecraft spigot server. can the creators or any mods post a tutorial and help me?

my friends and i have tried installing this mod from the minehut plugin website and it doesn't work. we've tried opening the .jar file, too, but it doesn't work either. this is what it looks like in the minehut page. any help would be wonderful!