I have the exact same Issue, this is my config.json:
I changed the name of my themefolder from “Roots Paradisepress” to “rootsparadisepress”, because I had an issue with the space in the directory name in wp-cli, when switching themes.
my publicPath originally was:
"publicPath": "\"/app/themes/Roots Paradisepress\"",
→ don’t understand the slash at the beginning of the path and the double quotation marks? Never seen anything like this …
Changing the path to "publicPath": "/app/themes/rootsparadisepress" didn’t fix the issue.
When I run yarn start, it opens the url localhost:3002, which is strange, because in config.json it says localhost:3000. Everything is loaded fine so far. When saving _global.scss, the browser window reloads, but does not show any changes made (also not in chrome dev tools).
This happens on a fresh installed Sage-Theme with bedrock and trellis.