ERROR in ./main.js
Module build failed: ReferenceError: [BABEL] /home/tomek/Pulpit/STUDIA/ZTI/klient/main.js: Unknown option: /home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/react/react.js.Children. Check out http://babeljs.io/docs/usage/options/ for more information about options.

A common cause of this error is the presence of a configuration options object without the corresponding preset name. Example:

Invalid:
  `{ presets: [{option: value}] }`
Valid:
  `{ presets: [['presetName', {option: value}]] }`

For more detailed information on preset configuration, please see http://babeljs.io/docs/plugins/#pluginpresets-options. (While processing preset: "/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/react/react.js")
    at Logger.error (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/logger.js:41:11)
    at OptionManager.mergeOptions (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:226:20)
    at /home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:265:14
    at /home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:323:22
    at Array.map (native)
    at OptionManager.resolvePresets (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:275:20)
    at OptionManager.mergePresets (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:264:10)
    at OptionManager.mergeOptions (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:249:14)
    at OptionManager.init (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/options/option-manager.js:368:12)
    at File.initOptions (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/index.js:212:65)
    at new File (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/file/index.js:135:24)
    at Pipeline.transform (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-core/lib/transformation/pipeline.js:46:16)
    at transpile (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-loader/lib/index.js:48:20)
    at Object.module.exports (/home/tomek/Pulpit/STUDIA/ZTI/klient/node_modules/babel-loader/lib/index.js:163:20)