Can't do any testing - TypeError: Converting circular structure to JSON

[mayteio]

I've ran through the first geospatial app course just fine. On to testing.

cd src/demos/testing-a-geospatial-app/4-testing-actions && npm i && npm run test

gives me the error Cannot find module 'babel-register'

npm i -D babel-register && npm run test

gives me the error Couldn't find preset "stage-2" relative to directory

npm i -D babel-preset-stage-2 && npm run test

Gives me the error Converting circular structure to JSON

Unsure where to go from here.