Ruby on Rail　コントローラー作成について

質問させていただきます。
初学者でして、お聞き苦しいところございましたら申し訳ありません。
Ruby on Railsにてコントローラーを作成しようと、
vocstartsoft:~/environment/sample_app (master) $ rails g controller homes
と入力するのですが、下記エラーコードが出て実行ができません。
今日一日色々と調べて試してみたのですが、全く変化がなくうまくいかず、どなたかご助力いただけますと恐縮です。
よろしくお願いいたします。

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