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[Unity] resource busy or lockedがでてきてPackageManagerがインストールできない

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現象

Package ManagerでCinemachineをインストールしようとすると、以下のエラーメッセージが表示

Cannot perform upm operation: EBUSY: resource busy or locked, open '~~~'
[NotFound].See console for more details
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

スクリーンショット 2020-10-18 134251.png

解決方法

Unity以外のアプリを全て閉じ、再インストール

エラーメッセージ的に、何かで影響するファイルが読み込み中の可能性が高いです。
自分は開発中だったため、VSCodeやVimで編集中にしたファイルがあったため閉じて再実行すれば解決しました。

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