Error starting packager: TypeError: Cannot read property 'version' of undefined

Description

When I try to use yarn start , I got this error. Error starting packager: TypeError: Cannot read property 'version' of undefined

Expected Behavior

All commands I used: create-react-native-app rn-awe yarn start

Observed Behavior

Error details

E:\Web\Joe.Wu\rn-awe>yarn start
yarn run v1.3.2
$ react-native-scripts start
17:16:47: Starting packager...
17:17:43: Error starting packager: TypeError: Cannot read property 'version' of undef
    at E:\xdl\src\project\Doctor.js:641:44
    at E:\Web\Joe.Wu\rn-awe\node_modules\lodash\lodash.js:4944:15
    at baseForOwn (E:\Web\Joe.Wu\rn-awe\node_modules\lodash\lodash.js:3001:24)
    at E:\Web\Joe.Wu\rn-awe\node_modules\lodash\lodash.js:4913:18
    at Function.forEach (E:\Web\Joe.Wu\rn-awe\node_modules\lodash\lodash.js:9359:14)
    at E:\xdl\src\project\Doctor.js:631:9
    at Generator.next (<anonymous>)
    at step (E:\Web\Joe.Wu\rn-awe\node_modules\react-native-scripts\node_modules\xdl\
    at E:\Web\Joe.Wu\rn-awe\node_modules\react-native-scripts\node_modules\xdl\build\
    at <anonymous>
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Environment

• npm ls react-native-scripts: – react-native-scripts@1.6.0
• npm ls react-native: – (empty) (Actually react-native is installed inside node_modules. I don’t know why there is empty.)
• npm ls expo: – (empty)
• node -v: v8.7.0
• npm -v: 5.4.2
• yarn --version: 1.3.2
• watchman version: Not installed

Also specify:

1. Operating system: Windows 7
2. Phone/emulator/simulator & version: Nubia NX549J

[TomKarachristos]

I solve this problem:

1. delete node-modules folder
2. delete package-lock and yarn-lock and left only the the package.json
3. run yarn install.

[travellerwjoe]

@fson Thank you for your support. I have tried again. It works now.