Module JSTimersExecution is not a registered callable module (calling callTimers)

Expo SDK
1

I keep getting this error when launching a new project. I m running version 20 of the sdk.

{
“name”: “styledemo”,
“version”: “0.0.0”,
“description”: “Hello Expo!”,
“author”: null,
“private”: true,
“main”: “node_modules/expo/AppEntry.js”,
“dependencies”: {
“expo”: “^20.0.0”,
“react”: “16.0.0-alpha.12”,
“react-native”: “https://github.com/expo/react-native/archive/sdk-20.0.0.tar.gz”
}
}

This is my package.json.

{
“expo”: {
“name”: “styledemo”,
“description”: “An empty new project”,
“slug”: “styledemo”,
“privacy”: “public”,
“sdkVersion”: “20.0.0”,
“version”: “1.0.0”,
“orientation”: “portrait”,
“primaryColor”: “#cccccc”,
“icon”: “./assets/icons/app-icon.png”,
“loading”: {
“icon”: “./assets/icons/loading-icon.png”,
“hideExponentText”: false
},
“packagerOpts”: {
“assetExts”: [“ttf”, “mp4”]
},
“ios”: {
“supportsTablet”: true
}
}
}

And this is my app.json file.

I hope somebody can help me.

2

Do you have the code for this project somewhere? Can you reproduce it using https://snack.expo.io? It’d help us a lot to be able to look at an example of what’s going wrong.

3

This is happening to me. I’ve got an expo app since earlier this year and has always worked. Now, sdk20 creates this error for me on Android, immediately upon startup. I tried removing all code from App.js and it still happens.

4

Same Issue
S.O: Ubuntu 16.4, virtual device by Genymotion, package.json
{ “name”: “betsapp”, “version”: “0.1.0”, “private”: true, “devDependencies”: { “jest-expo”: “~20.0.0”, “react-native-scripts”: “1.3.1”, “react-test-renderer”: “16.0.0-alpha.12” }, “main”: “./node_modules/react-native-scripts/build/bin/crna-entry.js”, “scripts”: { “start”: “react-native-scripts start”, “eject”: “react-native-scripts eject”,
“android”: “react-native-scripts android”, “ios”: “react-native-scripts ios”, “test”: “node node_modules/jest/bin/jest.js --watch” }, “jest”: { “preset”: “jest-expo” }, “dependencies”: { “expo”: “^20.0.0”,
“react”: “16.0.0-alpha.12”, “react-native”: “^0.47.0”, “react-native-elements”: “^0.16.0” }}

5

I had the same issue and got it sorted by removing the expo app from the simulator and running exp android to have it installed again. Hope this helps :slight_smile: