I'm having this error when executing yarn:app start:

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined at validateString (internal/validators.js:118:11) at Object.join (path.js:1039:7) at noopServiceWorkerMiddleware (/var/www/html/react-workspaces-playground/node_modules/react-dev-utils/noopServiceWorkerMiddleware.js:14:26) at Layer.handle [as handle_request] (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:317:13) at /var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:335:12) at next (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:275:10) at launchEditorMiddleware (/var/www/html/react-workspaces-playground/node_modules/react-dev-utils/errorOverlayMiddleware.js:20:7) at Layer.handle [as handle_request] (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:317:13) at /var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:335:12) at next (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/index.js:275:10) at handleWebpackInternalMiddleware (/var/www/html/react-workspaces-playground/node_modules/react-dev-utils/evalSourceMapMiddleware.js:42:7) at Layer.handle [as handle_request] (/var/www/html/react-workspaces-playground/node_modules/express/lib/router/layer.js:95:5)

Tools and versions:

• Windows 10 Enterprise
• Yarn: v1.19.0 (cannot use v1.22.0, due to this error).
• Lerna: 3.20.2
• @react-workspaces/react-scripts: 3.3.0-alpha-08

According to this stackoverflow topic, this error should be resolved by upgrading the react-scripts version to 3.4.0.