Proguard is such a trouble maker I’m not surprised you are running into issues. To determine the root of the issue you would have to share what the output from proguard is telling you. Copy that info and past it back in this thread. At a cursory glance it looks like “<init>” declarations might cause issues since angled brackets are reserved characters in XML. What you can do is wrap your proguard additions section in a CDATA declaration that has worked for me.