ツールをインストールしようとすると”trouble with your network”と表示されます。

Question

storybookというツールをインストールしようとして
初期設定のgetstorybookのコマンドを実行すると”Fetching packages”で止まってしまいました。

この場合何を疑えばよいでしょうか？

$ getstorybook
getstorybook - the simplest way to add a storybook to your project.

 • Detecting project type. ✓
 • Adding storybook support to your "Create React App" based project. ✓
 • Preparing to install dependencies. ✓

yarn install v1.6.0
[1/4] Resolving packages...
[2/4] Fetching packages...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
error An unexpected error occurred: "https://registry.yarnpkg.com/react-icons/-/react-icons-2.2.7.tgz: ESOCKETTIMEDOUT".
info If you think this is a bug, please open a bug report with the information provided in "C:\Users\katsumasa-sato\ui-components\yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

 • Installing dependencies. ✖

     An error occurred while installing dependencies.