Add troubleshooting recipe for "Invariant Violation: addComponentAsRefTo(...): Only a ReactOwner can have refs."

Author: gaearon

README.md

@@ -468,6 +468,12 @@ If you have context issues,
 2. Make sure you didn’t forget to wrap your root component in [`<Provider>`](#provider-store).
 3. If you use React Router, something like `<Provider>{() => routes}</Provider>` won’t work. Due to the way context works in React 0.13, it’s important that the `<Provider>` children are *created* inside that function. Just referencing an outside variable doesn’t do the trick. Instead of `<Provider>{() => routes}</Provider>`, write `<Provider>{createRoutes}</Provider>` where `createRoutes()` is a function that actually *creates* (and returns) the route configuration.
 
+### Invariant Violation: addComponentAsRefTo(...): Only a ReactOwner can have refs. This usually means that you're trying to add a ref to a component that doesn't have an owner
+
+If you’re using React for web, this usually means you have a [duplicate React](https://medium.com/@dan_abramov/two-weird-tricks-that-fix-react-7cf9bbdef375). Follow the linked instructions to fix this.
+
+If you’re using React Native, make sure you’re importing `react-redux/native` both for `<Provider>` and any `connect()` call. Importing from `react-redux` will not work on React Native.
+
 ## License
 
 MIT