What is UNA version you are using ? there were some change in OME API which was adopted in 15.0.0-B1
14.0.0
In this case Streams module could not work correctly (depending on OME version), so it's better to upgrade to latest UNA 15.0.0-B1 version to make it work with recent versions of OME.
So, it was working before B1. Upgrading is not an option. Again, we paid UNA to do the job.
