Invariant Violation: Native module cannot be null. Error when importing react-native-purchases in expo managed project on ios - react-native

Question

I have followed this guide to install react-native-purchases in my expo managed project :
https://www.revenuecat.com/blog/in-app-puchase-expo-managed-workflow/
When I import the package with this line : import Purchases from 'react-native-purchases';
I get the following error on ios (Ipad,14.5) :
Invariant Violation: Native module cannot be null.
at node_modules\react-native\Libraries\LogBox\LogBox.js:149:8 in registerError
at node_modules\react-native\Libraries\LogBox\LogBox.js:60:8 in errorImpl
at node_modules\react-native\Libraries\LogBox\LogBox.js:34:4 in console.error
at node_modules\expo\build\environment\react-native-logs.fx.js:27:4 in error
at node_modules\react-native\Libraries\Core\ExceptionsManager.js:104:6 in reportException
at node_modules\react-native\Libraries\Core\ExceptionsManager.js:172:19 in handleException
at node_modules\react-native\Libraries\Core\setUpErrorHandling.js:24:6 in handleError
at node_modules\expo-error-recovery\build\ErrorRecovery.fx.js:12:21 in ErrorUtils.setGlobalHandler$argument_0
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:294:29 in invoke
at node_modules\regenerator-runtime\runtime.js:63:36 in tryCatch
at node_modules\regenerator-runtime\runtime.js:155:27 in invoke
at node_modules\regenerator-runtime\runtime.js:165:18 in PromiseImpl.resolve.then$argument_0
at node_modules\react-native\node_modules\promise\setimmediate\core.js:37:13 in tryCallOne
at node_modules\react-native\node_modules\promise\setimmediate\core.js:123:24 in setImmediate$argument_0
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:123:14 in _callTimer
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:177:14 in _callImmediatesPass
at node_modules\react-native\Libraries\Core\Timers\JSTimers.js:437:30 in callImmediates
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:388:6 in __callImmediates
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:132:6 in __guard$argument_0
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:365:10 in __guard
at node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:131:4 in flushedQueue*
Here is my package.json :
{
"name": "uma",
"version": "1.2.0",
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"start": "expo start",
"android": "expo start --android",
"ios": "expo start --ios",
"web": "expo start --web",
"eject": "expo eject"
},
"dependencies": {
"#react-native-async-storage/async-storage": "~1.15.0",
"#react-native-community/slider": "4.1.12",
"#react-navigation/bottom-tabs": "^6.3.1",
"#react-navigation/native": "^6.0.10",
"#react-navigation/native-stack": "^6.6.1",
"#react-navigation/stack": "^6.2.1",
"#reduxjs/toolkit": "^1.8.1",
"axios": "^0.26.1",
"base-64": "^1.0.0",
"expo": "~44.0.0",
"expo-app-loading": "~1.3.0",
"expo-av": "~10.2.0",
"expo-checkbox": "~2.0.0",
"expo-file-system": "~13.1.4",
"expo-font": "~10.0.4",
"expo-linking": "~3.0.0",
"expo-notifications": "~0.14.0",
"expo-secure-store": "~11.1.0",
"expo-status-bar": "~1.2.0",
"expo-updates": "~0.11.7",
"react": "17.0.1",
"react-dom": "17.0.1",
"react-native": "0.64.3",
"react-native-gesture-handler": "~2.1.0",
"react-native-purchases": "^4.6.1",
"react-native-safe-area-context": "3.3.2",
"react-native-screens": "~3.10.1",
"react-native-sensitive-info": "^5.5.8",
"react-native-vector-icons": "^9.1.0",
"react-native-web": "0.17.1",
"react-redux": "^7.2.8",
"redux": "^4.1.2",
"redux-persist": "^6.0.0",
"redux-persist-sensitive-storage": "^1.0.0"
},
"devDependencies": {
"#babel/core": "^7.12.9",
"#redux-devtools/core": "^3.11.0"
},
"private": true
}
Any idea how to debug this ?
Thanks for your time !

Answer 1

I finally found the answer. I tried to use RevenueCat with Expo Go as I usually do. I needed to create a development build instead wich I was not familiar with before.
https://docs.expo.dev/development/build/
Now everything works just fine !