Ubuntu-mate-16.04: orca won't keep running

[B. Henry]

I just made a bootable usb-stick with the latest ubuntu-mate, 16 .04, on it.
Super alt s does not start orca, but either from the run box, or a terminal I can start orca. 
I hear "screenreader on", and right away, "screenreader  off".
This behavior occurs 100% of the time for me, tried 3 reboots.
Have others had this experience?
Thanks in advance for any feedback.
  

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     B.H.
   Registerd Linux User 521886