Tuve el proble a de <code>[webpack-cli] Unable to load &#x27;@webpack-cli/serve&#x27; command [webpack-cli] TypeError: devServerFlags is...

Tuve el proble a de

[webpack-cli] Unable to load '@webpack-cli/serve' command
[webpack-cli] TypeError: devServerFlags is not iterable
```, pero actualizando la versión a 4.9.1 de acuerdo a un foro de github solucione esa, luego tuve que comentar ``` contentBase  ```porque tenia otro error de 

Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.

• options has an unknown property ‘contentBase’. These properties are valid:

object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, setupMiddlewares?, static?, watchFiles?, webSocketServer? }

Alguien sabe porque?????