rails s でのWebpackerエラー

rails sして、Localhostを起動するが、

以下のようなエラーが出て、

解決できない。

【以下エラー文】

Webpacker::Manifest::MissingEntryError in hogehoge

Showing /Users/yuhiisk/Work/sites/smout/app/views/layouts/application.html.slim where line #10 raised:
Webpacker can't find application.js in /Users/yuhiisk/Work/sites/smout/public/packs/manifest.json. Possible causes:
1. You want to set webpacker.yml value of compile to true for your environment
unless you are using the `webpack -w` or the webpack-dev-server.
2. webpack has not yet re-run to reflect updates.
3. You have misconfigured Webpacker's config/webpacker.yml file.
4. Your webpack configuration is not creating a manifest.
Your manifest contains:
{
}

◉原因

どうやらwrapper のインストールはできているが、

コンパイルが出来てなかったことが判明。

◉下記のコマンドで解決♪

rails webpacker:install
rails webpacker:compile