[master iOS]Metro Bundler has encountered an internal error, please check your terminal error output for more details

[ShiYongjieGitHub]

This is all the relevant information of the terminal error:
Looking for JS files in
/Users/shiyongjie/Desktop/Git/Facebook/react-native

Metro Bundler ready.

Loading dependency graph, done.
error: bundling failed: ReferenceError: SHA-1 for file /Users/shiyongjie/Desktop/Git/Facebook/react-native/node_modules/react/index.js is not computed
at DependencyGraph.getSha1 (/Users/shiyongjie/Desktop/Git/Facebook/react-native/node_modules/metro/src/node-haste/DependencyGraph.js:224:3541)
at /Users/shiyongjie/Desktop/Git/Facebook/react-native/node_modules/metro/src/Bundler.js:263:56
at Generator.next ()
at step (/Users/shiyongjie/Desktop/Git/Facebook/react-native/node_modules/metro/src/Bundler.js:11:657)
at /Users/shiyongjie/Desktop/Git/Facebook/react-native/node_modules/metro/src/Bundler.js:11:817
at
at process._tickCallback (internal/process/next_tick.js:169:7)
BUNDLE [ios, dev] RNTester/js/RNTesterApp.ios.js ░░░░░░░░░░░░░░░░ 0.0% (0/2), failed.

And this is all all the relevant information of device red screen showing:
Metro Bundler has encountered an internal error, please check your terminal error output for more details

RCTFatal
__28-[RCTCxxBridge handleError:]_block_invoke
_dispatch_call_block_and_release
_dispatch_client_callout
_dispatch_main_queue_callback_4CF


CFRunLoopRunSpecific
GSEventRunModal
UIApplicationMain
main
# #

[ShiYongjieGitHub]

I run the RNTester project, and encounter this problem.

[react-native-bot]

It looks like your issue may be incomplete. Are all the fields required by the Issue Template filled out?

If you believe your issue contains all the relevant information, let us know in order to have a maintainer remove the No Template label.

[react-native-bot]

Potential fix is at jestjs/jest#6264

Closing as this issue belongs in https://github.com/facebook/metro

[handeglc]

I removed node_modules and run npm install then restarted my computer, now it works

[HarshitMadhav]

@handeglc thanks only npm install worked for me

[rrrhys]

Possible solution for typescript projects; check in rn-cli.config.js that js is included as a sourceExt.

E.g.:

module.exports = {
    resolver: {
        sourceExts: ['tsx', 'ts', 'js'] //in a typescript project, make sure js is still listed here.
    },
    transformer: {
        babelTransformerPath: require.resolve("react-native-typescript-transformer")
    }
};