Translation doesn't work

This workflow is not working with QDS.

1. Write qsTr() or qsTrId() in .qml files
2. Run lupdate on .qml files to generate .ts files with "qml_" prefix.
3. Run linguist to fill up the translated texts in .ts files
4. Put .ts in the i18n directory at the directory containing the main qml file
5. Run lrelease to generate .qm files from .ts files
6. Add these in .qmlproject
       multilanguageSupport: true
       supportedLanguages: ["en_US", "ja_JP"]
       primaryLanguage: "ja_JP"
7. Add Component.onCompleted: Qt.uiLanguage = "ja_JP"
8. Run the app and expect to see the Japanese-translated texts on the screen.

Currently this isn't working with QDS 4.5.1. I attached the project.