I was trying out the esup[1] package when I stumbled upon the exact same make-network-process error[2] in this debbugs.

I am copying Lars and Matthew on this thread hoping that they have an insight into what might be causing this, based on the commit history[3].

[1]: https://github.com/jschaf/esup

[2]: https://github.com/jschaf/esup/issues/25#issuecomment-232932617

Kaushal Modi