Graphing with node red and signalK

[JD1]

I didn't recall which version of the repository I used but I re-installed the stable ppa and still get the same error message (E: Unable to locate package opencpn-plugin-vdr). Do I need to downgrade OpenCPN (I am on 4.6.2) ?
I have upgraded to OpenPlotter 0.11.9 now.
Further testing has shown no crashing if I block the feed from the chart plotter and just have the feed from the GPS puck.