Expo not loading (React-Native) -- null Expo SDK version

Question

My app was working till today but now it looks like something happened to version 18 of Expo.
I got this error:

The experience you requested uses Expo SDK v(null), but this copy of Expo Client requires at least v20.0.0. The author should update their experience to a newer Expo SDK version.

I then:

Updated to Expo v20.0.0
Handled all unmet dependencies
yarn cache clean
rm -rf node_modules/
Reinstalled local node modules

and I'm still getting the same error.

What do I need to do to get Simulator to recognize that I am using the correct version of Expo?

Current environment:

Expo v20.0.0
react-native v0.47.0
Node v8.11.1
Xcode v9.3
Mac OS v10.13.4

Try [this](https://github.com/react-community/create-react-native-app/issues/480#issuecomment-345361673), maybe it'll . help — Pritish Vaidya, Apr 08 '18 at 18:58
It was a good idea, it didn't work though. Even deleting the simulator. — cameck, Apr 08 '18 at 20:05
@PritishVaidya I misread your first comment. And you suspicion was correct, I was missing `"sdkVersion": "20.0.0"` from my `app.json`. Adding it, `rm-rf node_modules && yarn install && yarn run ios --reset-cache` fixed that issue. Thanks! — cameck, Apr 08 '18 at 20:41

cameck · Accepted Answer · 2018-06-04T23:50:45.220

7

Thanks to @PritishVaidya for helping me figure this out.
The problem was simply that I was missing "sdkVersion": "20.0.0" from my app.json. The use of this is lined out in the Expo Docs.

For example:

{
  "expo": {
    "name": "My app",
    "slug": "my-app",
    "sdkVersion": "20.0.0",
    "privacy": "public"
  }
}

edited Jun 04 '18 at 23:50

answered Jun 04 '18 at 18:31

cameck

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Expo not loading (React-Native) -- null Expo SDK version

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