13

When upgrading to RN 0.59.4 and after a successful build - one can encounter the following error in metro bundler:

react native Cannot find module 'metro/src/reactNative Transformer

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17

I got this error message after upgrading to the latest expo version because I was getting the warning: "The global expo-cli package has been deprecated."

I fixed the error by running "npx expo install --fix".

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9

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.

Reference: https://github.com/facebook/metro/issues/293#issuecomment-452779809

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6

I solved the problem by deleting the node_modules folder and the package-lock.json file and then running again npm install

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2

Make sure that you at least:

"metro-react-native-babel-preset": "0.53.1"
In dev dependencies in your package.json file

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1

Since you upgraded ReactNative, you must close terminal where Metro is running and then re-run npx react-native start

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0

My issue was fixed after I uninstalled react-native-svg-transformer and reinstalled it with npm i -D react-native-svg-transformer

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