Since Android 6.0 is out finally it seems that a lot of people are using FocusGTD with it. Unfortunately the HTTP stack that I am using (apache-http-client) seems to have problems with the latest OS update.
Due to this fact and since google is deprecating apache-http-client, I decided to move over to okhttp.
Unfortunately, this means that I have to rewrite most of the networking code including the WEBDAV stack.
As part of this re-write, I have already released a bit of code as open source
So if you are one of the users using Android 6, rest assured that I am actively working on this, however the complexity is quite high so it will take a bit longer.