Sorry, that looks like it is due to PapaEngine not being able to share the session or (as far as I can tell) release the remoteIO input while it isn’t using it, so I’m not really able to offer help from this side of the picture if it runs as a singleton that can’t be stopped.
It’s unlikely to work to run a generalized engine that requires complete control over the session and i/o at the same time as performing low-latency speech recognition from a mic stream. OpenEars is designed to recover gracefully from other audio session usages when it starts listening, but it can’t avoid taking over the audio stream while it is being asked to perform recognition.
Did you try my suggestion of researching session mixing results in these forums?