Getting this error while building a react-native iOS app on xcode.
Started getting this error after npm install and rpm linking react-native-fs library. But
For me didn't work any from the above solutions and below it is what worked (I had already checked out Parallelize Build and added React)
1. Open XCode --> To Libraries add `$LibraryWhichDoesNotWork.xcodeproj$`
2. Then for your app in the `Build Phases` add to the `Link Binary with Libraries` the file `lib$LibraryWhichDoesNotWork$.a`