Unknown plugin relay

[Smeegol]

An iOS developer New to React Native. Error while run F8 app as below:

f8app git:(master) ✗ yarn ios
yarn run v1.6.0
$ babel-node ./scripts/open-ios-project.js
/Users/Smeegol/Dev-RN/f8app/node_modules/babel-core/lib/transformation/file/options/option-manager.js:180
          throw new ReferenceError(messages.get("pluginUnknown", plugin, loc, i, dirname));
          ^

ReferenceError: Unknown plugin "relay" specified in "/Users/Smeegol/Dev-RN/f8app/.babelrc" at 0, attempted to resolve relative to "/Users/Smeegol/Dev-RN/f8app"
    at /Users/Smeegol/Dev-RN/f8app/node_modules/babel-core/lib/transformation/file/options/option-manager.js:180:17
    at Array.map (<anonymous>)
    at Function.normalisePlugins (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-core/lib/transformation/file/options/option-manager.js:158:20)
    at OptionManager.mergeOptions (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-core/lib/transformation/file/options/option-manager.js:234:36)
    at OptionManager.init (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
    at compile (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-register/lib/node.js:103:45)
    at loader (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-register/lib/node.js:144:14)
    at Object.require.extensions.(anonymous function) [as .js] (/Users/Smeegol/Dev-RN/f8app/node_modules/babel-register/lib/node.js:154:7)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.