yarn dev and npm run dev don't show a dev window of the app

[darthdeus]

Prerequisites

• Using yarn
• Using node 10.x
• Using an up-to-date master branch
• Using latest version of devtools. See wiki for howto update
• Link to stacktrace in a Gist (for bugs)
• For issue in production release, devtools output of DEBUG_PROD=true yarn build && yarn start
• Tried solutions mentioned in #400

Expected Behavior

An electron window should open with the app loaded.

Current Behavior

Running yarn dev starts up all the subprocesses but no electron window is shown

PS C:\dev\your-project-name> yarn dev
yarn run v1.22.0
$ cross-env START_HOT=1 node -r @babel/register ./internals/scripts/CheckPortInUse.js && cross-env START_HOT=1 yarn start-renderer-dev
$ cross-env NODE_ENV=development webpack-dev-server --config configs/webpack.config.renderer.dev.babel.js
Starting Main Process...

> electron-react-boilerplate@1.0.0 start-main-dev C:\dev\your-project-name
> cross-env START_HOT=1 NODE_ENV=development electron -r ./internals/scripts/BabelRegister ./app/main.dev.ts

Steps to Reproduce (for bugs)

1. git clone --depth 1 --single-branch --branch master https://github.com/electron-react-boilerplate/electron-react-boilerplate.git your-project-name

2. cd your-project-name

3. yarn

4. yarn dev

Your Environment

• Node version : tried 10.x, 12.x and 13.x
• Version or Branch used : master
• Operating System and version : Windows 10

[lafis]

Duplicate of #2327
does this 2327#issuecomment-569184150 help?

Try turning off dark mode in Win10.

electron/electron#19468