HTTP GET /launch responded 500 (NullReference)

Hi everyone,

I am regularly encountering this issue when spawning my local compute.
It’s appearing even without opening anything in Grasshopper. I just go the the Preferences Panel and I click the Child Process Count button.
Running the latest 8.6 version of Rhino.
If I press CTRL+C the compute windows closes, and then if I run it again, the same thing happens over and over.

This looks like a bug. I’ll have to test this tomorrow.