AWSのEC2インスタンスの環境構築にて、node.jsがインストールできない。

前提・実現したいこと

AWSのEC2インスタンス環境構築にて、こちらのqiita記事を参考に進めていたのですが、node.jsのインストールを行う際に以下のようなエラーメッセージを残して、エラーが発生してしまいます。

何か設定にミスがあるのか、対処法等ご存知であればご教示いただければ幸いです。
よろしくお願いいたします。

発生している問題・エラーメッセージ

Loaded plugins: priorities, update-motd, upgrade-helper


 One of the configured repositories failed (Unknown),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Disable the repository, so yum won't use it by default. Yum will then
        just ignore the repository until you permanently enable it again or use
        --enablerepo for temporary usage:

            yum-config-manager --disable <repoid>

     4. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again