As a long-time devoted user of nanoc, I remain necessarily an amateur. I get stuck, on rare occasions, and this is one of them.
(My OS: Pop!_OS Linux, fully updated.)
I have copied all files from a directory containing a website for which I regularly use nanoc very successfully into a new directory, with the intent to simply add new content and take off from there. It's a no-go. I've reviewed nanoc documentation, and all the relevant config files (Rules, nanoc.yaml, etc.). I have not found the problem.
My crash log:
https://pastebin.com/nXwmeQV0Any help at all would be much appreciated!
Tom