I study https://blog.graph.cool/getting-started-with-relay-modern-46f8de6bd6ec . on 3. Displaying all Posts: I had install all modules and copy all sources to my instagram folder, like in articel describe. But after yarn start I got an error: Failed to compile. ./src/index.js Module build failed: ReferenceError: Unknown plugin "relay" specified in "/Users/gerd/instagram/package.json" at 0, attempted to resolve relative to "/Users/gerd/instagram" at Array.map (native) On google I found no answer! Any help?