How to use 'Electron --trace-warnings...'

[amosglenn]

I have an error that is preventing the magicmirror window from showing up. The terminal log is suggesting this:

(Use `Electron --trace-warnings ...` to show where the warning was created)

How do I do that? It looks like it should go in the terminal, but I can’t find any simple explanation.

Thanks!

[sdetweil]

@amosglenn show me the actual error