Cannot read property 'RNFSFileTypeRegular' of null (for Windows platform)

Question

I installed the react-native-fs for my project and got this error right away.

It is a latest react native for windows application and has the react-native-fs v. 2.20.0 installed.

• I tried downgrading to 2.19.0 and 2.15.1.
• Reset Cache.
• Delete package-lock.json and npm install again.

No luck so far. Is there anything else I can try?