Comment 25 for bug 788322

quote from Thomas Schmitt

is most probably the known growisofs bug about unformatted BD-R,
which it formats automatically but then forgets to have done.
An inappropriate CLOSE SESSION command is sent in the end and
causes the error message. Diagnosis and fix are here:
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=713016

Workaround:
Add growisofs option -use-the-force-luke=spare=none if the BD-R
medium is detected as blank. Or run dvd+rw-format on the BD-R
before running growisofs.