ENOENT: no such file or directory, open RNDebuggerWorker.js

[ksielyov]

Error: ENOENT: no such file or directory, open 'file:///Applications/React%20Native%20Debugger.app/Contents/Resources/app.asar/js/RNDebuggerWorker.js'
at Object.openSync (fs.js:498:3)
at Object.readFileSync (fs.js:394:35)
at getCodeFrame (/Users/mikhailkiselyov/WebstormProjects/languagenow2clone/node_modules/metro/src/Server.js:995:18)
at /Users/mikhailkiselyov/WebstormProjects/languagenow2clone/node_modules/metro/src/Server.js:1054:24
at Generator.next ()
at asyncGeneratorStep (/Users/mikhailkiselyov/WebstormProjects/languagenow2clone/node_modules/metro/src/Server.js:99:24)
at _next (/Users/mikhailkiselyov/WebstormProjects/languagenow2clone/node_modules/metro/src/Server.js:119:9)
at runMicrotasks ()
at processTicksAndRejections (internal/process/task_queues.js:95:5)

React Native Debugger app version: [0.11]
React Native version: [0.63.3]
Platform: [IOS and Android.]
Is real device of platform: [No]
Operating System: [macOS - Apple Silicon]

[kvlknctk]

same issue

[alanltr]

same for me

[s0rta]

trying to open the file in the browser confirms that it does not exist, at least not at that path.

[FrogBattle]

Same here. The issue occurred after upgrading to newer Expo, React/React Native versions.

Versions:

• Expo 45 SDK
• React Native: 0.68.2
• React: 17.0.2
• React Native Debugger App: 0.12.1
• Yarn resolution:

"resolutions": {
    "react-devtools-core": "4.14.0"
  },

Environment:

• Expo Managed project
• iOS Simulator
• MacOS Monterey

Trace:

Error: ENOENT: no such file or directory, open '/****/file:/Applications/React%20Native%20Debugger.app/Contents/Resources/app.asar/js/RNDebuggerWorker.js'
    at Object.openSync (node:fs:585:3)
    at Object.readFileSync (node:fs:453:35)
    at getCodeFrame (/****/node_modules/metro/src/Server.js:949:18)
    at Server._symbolicate (/****/node_modules/metro/src/Server.js:1022:22)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at Server._processRequest (/****/node_modules/metro/src/Server.js:429:7) {
  errno: -2,
  syscall: 'open',
  code: 'ENOENT',
  path: '/****/file:/Applications/React%20Native%20Debugger.app/Contents/Resources/app.asar/js/RNDebuggerWorker.js'
}

I have attempted several fixes with low confidence, however, as there is not much community knowledge around this issue:

• Remove/Reinstall dependencies.
• Attempt different versions of react-devtools-core & the yarn resolution.
• Update to latest react-native-debugger version.
• Clear Expo cache: expo start --clear.
• Reinstall Expo app within the iOS simulator.

I hope this issue gains more popularity and gets resolved. I consider using alternative tools because of it, even though I have mostly used RND successfully in the last 2 years.

Solution

Turned out I had an entrypoint problem as I forgot to update app.json and "expo": { "entryPoint": "./index.js", ...} to point to the new entrypoint file I added. This was part of the configuration of migrating to the new Expo build system.

In general, this was the cause of the error, however, it was not reported by RND, making it seem the problem (as described above) was the root cause. Whoever it may help, ensure your app entrypoint before trying to solve this problem.

[anujraghuvanshi]

Getting the same issue React native (CLI). Not able to connect to debuggger

[jobayer977]

Same issues I'm facing

[KAMRONBEK]

Any updates on this issue?

[alexzobi]

Just FYI I found myself here because I had just upgraded to RN0.70.6. What I didn't think about was that the upgrade uses Hermes as a default. RNDebugger requires the use of the V8 engine to run, which obviously means Hermes breaks RNDebugger. If you're here for the same reason, here are two solutions:

1. you can disable hermes (and all the benefits that come along with it)
2. you can use a different debugging tool. There has been a feature request for Hermes support, but I'm not sure the owner has the overhead for this.

If you choose to stick with Hermes, in order to clear the above on ios, you'll need to clear your device settings. Device -> Erase all content and settings.

[SliverYuki]

same issue, any update?

[coldSeattle]

same issue +

[tlhai-cmc]

same issue +