Tabify not starting

Hey! I don't what i am doing wrong. I installed tabify plugin but it's not starting in my server?

Do you have required dependency installed? Tabify plugin requires to have PlaceholderAPI installed.

RobiGames Oh yea... that fixed it! but now i need to install placeholder extensions? or how do i fix this?
Issue

But since you have already installed the plugin and dependency then you can run these commands in-game:

And then it should work. All you have to do now is to edit config.yml file.

Thanks! Works!