How to Fix “Unable to Resolve Module” Errors in React Native and Expo If you have been working with React Native or Expo for a while, there is a good chance you have seen an error that looks something like this: Unable to resolve module ./componen...

There is a particular kind of Expo error that I think almost every developer eventually runs into. You make a change to your project, run your usual build command: eas build and instead of getting a nice .apk or .aab at the end, you get: Build ...

You make a small change to your React Native project, install a new package, or upgrade a dependency. Everything looks fine until you try to build your Android app. Then Gradle stops with something like: Execution failed for task ':app:mergeDexDebu...

If you've been developing with React Native or Expo for a while, chances are you've had a project that suddenly refuses to build for what seems like no reason. Maybe you installed a new package. Maybe you upgraded Expo. Maybe you only changed a sin...

I recently spent far more time than I'd like to admit chasing down a hard crash after upgrading a project from Expo SDK 54 to 55. The app launched fine. Navigation worked. Everything looked normal. Then the moment a Reanimated animation fired, the...

Fixing the "Namespace Not Specified" Error in React Native and Expo Android Builds If you recently upgraded a project to React Native 0.73+ or bumped your Expo SDK to version 50+, you may have run into an Android build error that looks something li...

The Crash You pull down a fresh React Native repo, or you upgrade your Expo project, navigate to your ios directory, and run your standard installation command: pod install Instead of a clean build, your terminal drops a wall of text pointing to...

If you are running a large production build or a data-heavy script in Node.js, you have probably run into this crash: Plaintext FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory The V8 stack...

How to Fix MismatchSenderId in Expo EAS Push Notifications Across Multiple Environments If you are managing multiple environments Staging, Preview, Production in a React Native Expo app, setting up Firebase Cloud Messaging FCM can quickly turn into...

How to Fix "resource drawable/splashscreenlogo not found" After an Expo SDK Upgrade Upgrading your Expo SDK version to keep up with the latest App Store and Google Play requirements is usually a smooth process—until Gradle decides to punch you in t...

We’ve all been there. You find an awesome library, you run npx expo install, you import it into your code, and you start your development server. You expect magic. Instead, your simulator turns blindingly red with an error that looks something li...

We’ve all been there. You spend weeks building a feature, testing it on your local simulator or a physical device running a development stream. Everything is butter. No lag, no warnings. You confidently bundle the app, ship it to TestFlight, wait fo...

It’s the same story every time. You run a simple package upgrade, or you decide it's time to bump your Expo SDK version. Locally, JavaScript compiled perfectly. But the second you run a native build, your terminal explodes with hundreds of lines of r...

You just upgraded your local development environment, updated Xcode, or bumped a minor patch version in your React Native project. You open your terminal, run your standard iOS build command, and instead of a clean bundling process, the terminal thro...

If your React Native or Expo Android compilation suddenly crashes with a massive terminal stack trace pointing to an "unsupported class file major version" or claims a class file has the wrong version e.g., wrong version 65.0, should be 61.0, your en...

If your Android native build is constantly failing with a TLS handshake error when trying to download dependencies from Maven Central, the root cause might be an invisible environment variable polluting your Java settings. The most frustrating part...

Ever run a fresh compilation on a React Native project, change absolutely nothing, and watch your simulator immediately crash with this terminal masterpiece? ERROR Invariant Violation: TurboModuleRegistry.getEnforcing...: 'RNGestureHandlerModule' co...

If you’ve been building mobile apps with React Native or Expo long enough, you’ve definitely hit that brick wall where a standard debug build works perfectly, but the moment you run eas build or try to compile a production AAB/APK for the Play Store,...

5 React Native Errors That Cost Me Hours And How I Finally Fixed Them When I started building my React Native app, I thought the hard part would be designing the app itself. Turns out, debugging the environment was the real boss fight. I spent ho...

Why React Native Builds Break After Updating Dependencies And How to Fix It If you've ever updated your dependencies and suddenly your React Native Android build stops working… you're not alone. Everything worked before. You change a few versions...