Visual Studio 2015 - Fixing Dependencies npm not installed

Maria and I were doing some work together on Thursday and I did a clone of one of her ASP.NET Core repositories and opened it in Visual Studio 2015 Community Edition on my local machine. Some of the JavaScript tool libraries didn't load so I went back into Solution Explorer to see if there was a problem and I saw this weird error that said (or at least, I read it as) "npm not installed."