webpack server error

[hankeliu2015]

./bin/webpack-dev-server
warning package.json: No license field
✖ ｢wds｣: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.

• configuration.entry should be an non-empty object.
  -> Multiple entry bundles are created. The key is the chunk name. The value can be a string or an array.

[hankeliu2015]

"We'll keep all of the changes except for the hello_react component. " Do we need to delete the hello_react component? Not see this component under src folder.

[hankeliu2015]

reinstalled rails app resolved it