Problem/Bug ASkyBlock World Bug

Hey, I started using the plugin ASkyBlock very recently to run my SkyBlock Server, I found a major problem where ASkyBlock was generating a completely new world to generate islands, I tried to save this problem by changing the world defined as the ASkyBlock World to mot world but a error popped up saying that I need to add the world to bukkit.yml or reboot the server. I tried both options but the plugin still doesn't work. Any help is appreciated, thanks.