Emeraldimension

So I've looked through my plugins and NyaaCore isn't working right. Is there any plugins required to be installed in order for it to work? I've looked at the website and all I can find is EssentialsX and Vault. I've already installed vault but cannot find EssentialsX anywhere. Could there be another issue and would anyone be willing to tell me? Problems: Using /plugins shows a list of plugins installed, and Nyaacore is highlighted in red, along with RPGitems.