this plugin is ment to load projects create with the flowy-tool. it let's you choose from the avaible projects and renders the date as sketch artboards with images and some text information from the flowy-graph.
if you do not have a flowy-project, checkout flowy frontend and backend to create one ;)
clone and double-click the repository. sketch should install it automatically.
https://github.com/el-j/flowy-frontend
you need to have the flowybackendserver running with some projects. otherwise you cannot use the plugin.