My teampass instance nor the demo instance is showing any folders. And plus button is greyed out. There are also no errors, so I have no idea what is wrong.
I really like this app, however in my opinion can't be used for a multiuser teampass where each user has access to read specific folders only. It is very important to be able to read only the folders that the user as at least read access to. In every other sense I consider it a great addition to teampass which still lacks a mobile Web interface for now. I am however pretty sure this is more of a teampass-api shortcoming then the app itself.