Unable to build SCWB on Windows 10

I discovered in recent days that I am unable to build the current version of SCWB on my Windows 10 laptop using Git Bash.

This process still works when I check out the latest tag -- `v3.1.1` from the latest release, in September 2019 -- and build with Python 2.7.15.
- run `npm install`
- run `./node_modules/.bin/electron-rebuild`
- run `npm start` -- SCWB launched, looked good, displayed some data just fine
- close the SCWB 3.1.1 instance
- run `/c/Python27/python.exe build.py`
- navigate to the `/dist/` folder, double click `ScanCode-Workbench.exe` and no errors -- SCWB 3.1.1 opens, runs fine, looks great.

With the current code, the 1st 3 steps work with both Python 2.7.15 and Python3 (3.8.3). No error during the build process, but when I try to run the built `.exe` I get a JavaScript error: `Cannot find module '../dist/src/main'`.

Not sure what is meant by `Cannot find module '../dist/src/main'` but can confirm there is no such folder. Same result when extracting the .zip and running the `.exe` found there. I also get an error running `npm test`.

Perhaps I'm using the wrong version of `npm`, or `node.js` (but they look like they meet the RTD Windows requirements -- https://scancode-workbench.readthedocs.io/en/develop/contribute/building.html#windows)? (I have npm 5.2.0 and node 12.16.3.) Seems like some conflict was introduced after the 3.1.1 tag was created.