metro: Error: Cannot find module 'metro/src/DeltaBundler/Worker'

When I run the react-native start I am getting this error message. I cleaned up all cache and removed node_modules/ these don’t work.

Can anyone help me, please?

My versions are.

react-native -v
react-native-cli: 1.2.0
react-native: 0.57.3

All code block as below;

react-native start --reset-cache
┌──────────────────────────────────────────────────────────────────────────────┐
│                                                                              │
│  Running Metro Bundler on port 8081.                                         │
│                                                                              │
│  Keep Metro running while developing on any JS projects. Feel free to        │
│  close this tab and run your own Metro instance if you prefer.               │
│                                                                              │
│  https://github.com/facebook/react-native                                    │
│                                                                              │
└──────────────────────────────────────────────────────────────────────────────┘

Looking for JS files in
   /Users/m/p/my-project

warning: the transform cache was reset.
Loading dependency graph, done.
Loading dependency graph...(node:26114) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: Cannot find module 'metro/src/DeltaBundler/Worker'
(node:26114) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

About this issue

Original URL
State: open
Created 6 years ago
Reactions: 11
Comments: 18

Links to this issue

react native Cannot find module 'metro/src/reactNative Transformer' - Stack Overflow

Commits related to this issue

reinstalling metro package Error: Cannot find module 'metro/src/DeltaBundler/Worker' https://github.com/facebook/metro/issues/293 — committed to VijayentKohli/CovidVaccineTracker by deleted user 3 years ago

Most upvoted comments

@soranoba didn’t work for me either. @aafarian I think there’s an issue with the version of metro packaged with the latest RN Upgrade. I just installed locally in dev metro npm install --save-dev metro, which is the version 0.51.1, and that worked for me.

+98

cladjules on Jan 9, 2019

FYI: I also encountered the same issue, but I solved it.

rm -rf $TMPDIR/metro-cache*
watchman watch-del-all
react-native start --reset-cache

+14

soranoba on Oct 22, 2018

reinstalling metro solved my problem:

npm install --save-dev metro

+10

MerveGencer on Mar 17, 2020

@soranoba I’ve tried that, didn’t work for me

aafarian on Dec 31, 2018

I got this error to go away by uninstalling metro and installing metro-config. Not sure if it will work in everyone’s case.

aafarian on Jan 3, 2019

If you are using Yarn try this ❤️ yarn add --dev metro metro-core

ShahzaibMunawar on Jun 4, 2020