Windows Phone アプリを開発しました。エミュレーターではなくデバイスでアプリを実行すると、次のエラーが発生します。
エラー:
1>------ Build started: Project: Demo, Configuration: Debug Any CPU ------
1> Begin application manifest generation
1> No changes detected. Application manifest file is up to date
1> Begin Xap packaging
1> No changes detected. Xap package is up to date
2>------ Deploy started: Project: Demo, Configuration: Debug Any CPU ------
2>Deployment of application to device failed.
2>Error: App deployment failed. Please try again.
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Deploy: 0 succeeded, 1 failed, 0 skipped ==========
問題がどこにあるのかわかりません。誰か助けてくれませんか?