Exception in HostObject::get(propName:RNDeviceInfo): <unknown>

Summary

Version	8.1.3
Affected OS	iOS
OS Version	14.5

Current behavior

On startup, the app is crashing and displays this error message:

When we remove the lib, everything works fine. We already tried to delete and reinstall node_modules, reinstall Pods, it’s not working.

Below, the code that generates the error:

 if (DeviceInfo.hasNotch()) {
    // in case the notch returns undefined I put
    // a default value that I calculated on an iphone 12
    statusBar = StatusBar.currentHeight || 65;
  }

Expected behavior

We should be able to know if the current device has, or not, a notch. The function returns a boolean.

[stevem21m]

Like @sandergo90 said, my project did not have a version number. Once I added a version number (Target > General > Identity > Version) it worked. Thanks

[sandergo90]

I’ve had the same problem in a new react native project. Best advise I can give is to check if any variable that’s declared in your Info.plist, is also declared in your project.pbxproj file. For me for example, the string ${MARKETING_VERSION} dit not exist in my project.pbxproj file because I deleted the short version string of my app in Xcode. So when leaving the version empty, react-native-device-info will crash because it tries to fetch a null value.