Hi, I'm getting that error when trying to [build the RN module from source](https://facebook.github.io/react-native/docs/android-building-from-source.html). Apparently that's a problem caused by [this line](https://github.com/facebook/react-native/blob/4cff039d78828487009e7832ed54125b181bbbab/ReactAndroid/release.gradle#L15). Vaiden seems to have a solution for that error as explained [here](https://stackoverflow.com/questions/43967489/could-not-get-unknown-property-repositoryurl-for-project). I'll create a pull request today.