They've been telling client developers that they should move from screen-scraping to using the API (https://github.com/HackerNews/API) for a while now. I don't know if that's the problem with this specific client, but you may want to check with the developers and see if it is, and if so, what their ETA is for getting onto the API.
The issue with the current API is that it's read-only, so clients can't completely migrate to it. Using a combination of the API for reads and scraping for checking responses to writes makes things a bit difficult.
