undefined is not an object (evaluating n.reactCurrentOwner

[Aroniez]

After adding all my necessary npm packages on my app and try to run, I'm en counteracting this bug. I have tried the following and still same bug

watchman watch-del-all
rm -rf ./node_modules
yarn cache clean
rm -rf $TMPDIR/react-*
yarn install
npm start -- --reset-cache

I've also tried to update everything to latest version and still same bug. i.e

react-native: 0.45
react: 16.0.0-alpha.12

Anybody else with similar issue?

Environment

react-native-cli: 1.0.0
react-native: 0.44.0
react: 16.0.0-alpha.6
node: v6.10.0
npm: 4.5.0
yarn: 0.27.5

Platform: Android
OS: Windows
Android Studio

Steps to Reproduce

react-native run-android

Expected Behavior

It's supposed to show app main page

parsing template literals

Actual Behavior
red error page with
undefined is not an object (evaluating n.reactCurrentOwner

[brentvatne]

Hi there! Is this happening for you on a blank React Native project? react-native init SomeProject and then react-native run-android causes the problem for you? If not, can you share an example project with this happening? Thanks!

[DevHossamHassan]

I'm stuck on this issue too,
I'm currently using those versions:

react: 16.0.0-alpha.12
react-native: 0.45.1
npm: 5.0.3
node: v8.1.3
yarn: v0.24.6

[crazyx13th]

hi there,
same problem here. sdk17 works, sdk18 not :-/

app.js

import React from 'react';
import {Text, View, AppRegistry} from "react-native";

export default class App extends React.Component {
    constructor() {
        super();
    }
    render() {
        return (
            <View style={{
                margin: 50
            }}>
                <Text>Hallo 1.0.1</Text>
            </View>
        );
    }
}
AppRegistry.registerComponent('main', () => App);

package.json

{
	"name": "nacked-app",
	"version": "1.0.0",
	"private": true,
	"scripts": {
		"exp-start": "exp start --clear",
		"exp-build-ios": "exp build:ios",
		"exp-build-android": "exp build:android",
		"exp-build-status": "exp build:status",
		"reset1": "rimraf \"C:/Users/xxxxxxxxx/AppData/Roaming/npm-cache/*\"",
		"reset2": "rimraf \"C:/Users/xxxxxxxxx/AppData/Local/Temp/react-*\"",
		"reset3": "rimraf \"C:/Users/xxxxxxxxx/AppData/Local/Temp/npm-*\"",
		"reset4": "rimraf node_modules",
		"reset5": "npm cache clean",
		"reset6": "npm i",
		"reset7": "node node_modules/react-native/local-cli/cli.js start --reset-cache",
		"log1": "node node_modules/react-native/local-cli/cli.js log-android"
	},
	"dependencies": {
		"expo": "18.0.0",
		"react": "16.0.0-alpha.6",
		"react-native": "github:exponent/react-native#sdk-18.0.0"
	},
	"devDependencies": {
		"cross-env": "5.0.1",
		"exp": "42.1.0",
		"npm-check-updates": "2.12.1",
		"rimraf": "2.6.1"
	}
}

exp.json

{
	"version": "1.0.0",
	"name": "nackedapp",
	"slug": "nackedapp",
	"privacy": "unlisted",
	"entryPoint": "app.js",
	"icon": "expo.png",
	"orientation": "portrait",
	"sdkVersion": "18.0.0",
	"packagerOpts": {
		"assetExts": [
			"ttf"
		]
	},
	"loading": {
		"icon": "src/icons/expo.png"
	},
	"ios": {
		"bundleIdentifier": "com.nackedapp.exp.ios",
		"config": {
			"usesNonExemptEncryption": false
		}
	},
	"android": {
		"package": "com.nackedapp.exp.android"
	}
}

thanks!

greetings crazyx13th

[crazyx13th]

works again with:

"expo": "18.0.9",
"react-native": "0.46.1"

[crazyx13th]

sorry,
"react": "16.0.0-alpha.6" i got this error
"react": "16.0.0-alpha.7" i got another error
"react": "16.0.0-alpha.8" seems to works

[Aroniez]

blank project from react-native init somename works fine. The issue is actually when I build a debug or release apk and run it. running react-native run-android works fine. Not sure what's being broken on building apk and installing it on device/emulator. here is my package.json

{
  "name": "my app",
  "version": "1.0.0",
  "description": "My coolest app",
  "author": "Aroniez",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "firebase": "^3.6.4",
    "html-entities": "^1.2.1",
    "lodash": "^4.17.2",
    "moment": "^2.17.1",
    "react": "16.0.0-alpha.6",
    "react-native": "0.44.2",
    "react-native-admob": "^1.3.0",
    "react-native-animatable": "^1.1.1",
    "react-native-blur": "^3.0.0-alpha",
    "react-native-drawer": "2.*",
    "react-native-dropdownalert": "^2.3.0",
    "react-native-fbsdk": "^0.6.0",
    "react-native-fence-html": "^1.0.6",
    "react-native-google-analytics-bridge": "^5.0.1",
    "react-native-google-signin": "^0.10.0",
    "react-native-invertible-scroll-view": "^1.0.0",
    "react-native-linear-gradient": "^2.0.0",
    "react-native-modalbox": "^1.3.9",
    "react-native-onesignal": "^3.0.4",
    "react-native-render-html": "^2.0.0",
    "react-native-scrollable-tab-view": "0.*",
    "react-native-snap-carousel": "2.1.1",
    "react-native-swiper": "1.*",
    "react-native-timeago": "0.*",
    "react-native-vector-icons": "^4.2.0",
    "react-navigation": "^1.0.0-beta.11",
    "react-redux": "^5.0.4",
    "react-timer-mixin": "^0.13.3",
    "react-tween-state": "^0.1.5",
    "redux": "^3.6.0",
    "redux-persist": "^4.8.0",
    "redux-thunk": "^2.2.0",
    "sanitize-html": "^1.13.0",
    "striptags": "^3.0.1",
    "urijs": "^1.18.4",
    "url": "^0.11.0",
    "util": "^0.10.3",
    "wpapi": "^1.1.1"
  },
  "devDependencies": {
    "babel-jest": "20.0.3",
    "babel-preset-react-native": "1.9.2",
    "jest": "20.0.4",
    "react-test-renderer": "16.0.0-alpha.6"
  },
  "jest": {
    "preset": "react-native"
  }
}

[Aroniez]

@crazyx13th "react": "16.0.0-alpha.8" works fine?

[crazyx13th]

yupp, inside my minimal test project

[Aroniez]

Let me try that

[L1fescape]

I'm experiencing a similar issue issue when trying to add react-native-web to an existing react-native project: Cannot read property 'ReactCurrentOwner' of undefined. react-native-web currently requires react v15.4.x which is a different version than the one installed with the current version of react-native. To fix the issue I had to downgrade react-native to 0.42.3 (which uses react ~15.4.0 as a peer dependency) and set react, react-dom, and react-test-renderer to 15.4.1.

tl;dr make sure the versions of react in your dependencies are matching.