Solving the "Replace Hermes for the right configuration" error in React Native

Sam - Feb 18 - - Dev Community

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Hey there, React Native devs! Ever stumbled upon the dreaded "Replace Hermes for the right configuration, if needed" error message while working on your project? It's like hitting a brick wall in your coding journey, right? But fear not, the fix is simpler than you might think.

So, here's the deal: when you see that cryptic error pop up, it's usually because something's wonky with your Hermes setup. Hermes is awesome for optimizing React Native apps, but if it's not configured properly, you'll get this headache-inducing message.

Here's the trick: just head over to your project's ios folder and look for a sneaky little file called .xcode.env.local. Yep, that's the culprit! It will often contain the bath to your Node binary, like export NODE_BINARY=/usr/local/bin/node. But sometimes, this file will have a very wrong path altogether. To set things straight, just delete that pesky file, rebuild your project, and voilà! No more Hermes errors slowing you down. Keep coding, and remember, every error is just another chance to learn and grow!

If that doesn't solve it, you can explore other ideas on Github - https://github.com/facebook/react-native/issues/39903

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