Error: Cannot call method rewriteRequestUrl in _this7._config.server in React native version 0.64.1

After diligently following all the guidelines provided at the upgrade helper for transitioning from RNv0.62 to v0.64.1, I managed to successfully install my app on the device. However, my metro bundler is encountering an obscure error that has left me perplexed.

Every time I attempt to run the packager, it produces this cryptic message:

TypeError: _this7._config.server.rewriteRequestUrl is not a function at node_modules/metro/src/Server.js:1011:39
. If anyone could provide assistance on how to troubleshoot this issue, I would greatly appreciate it.

To investigate the disparity, I compared the _this7._config.server object in my project with that of a functioning 0.64.1 project, and the differences were evident.

My _this7._config.server after the update process:

{
  useGlobalHotkey: true,
  port: 8081,
  enableVisualizer: false,
  enhanceMiddleware: [Function (anonymous)],
  runInspectorProxy: true,
  verifyConnections: false
}

The _this7._config.server in the 0.64.1 project that is operational:

{
  useGlobalHotkey: true,
  port: 8081,
  enhanceMiddleware: [Function (anonymous)],
  rewriteRequestUrl: [Function: rewriteRequestUrl],
  runInspectorProxy: true,
  verifyConnections: false
}

I am struggling to pinpoint the exact issue due to the disparities in the configurations.

Answer №1

Consider updating your metro version as well.

I encountered a similar issue related to conflicts with metro version.

We were using metro version 0.56, and when we upgraded from 0.63 to 0.64, the @react-native-community/cli metro version also increased to 0.64.0.

As a result, metro resolutions were failing and causing this error to be thrown.

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