Qt Design Viewer fails to load projects with FlowView

Steps to reproduce

1. Create a new project in Qt Design Studio
2. Add "import FlowView" and "FlowView {}" to Screen01.ui.qml
3. Click "File" > "Share Application Online" and upload the project
4. Open the project in a web browser and open the developer console (F12 in Firefox or Chrome)

Outcomes
The project fails to load. The console shows this error:

https://designviewer.qt.io/#71fe474e1f2da8203172354aacd27871/UntitledProject.qmlrc(WASM) Critical: "m_qmlComponent is not ready. Reason: qrc:/2936851104/UntitledProject1Content/App.qml:14 Type Screen01 unavailable\nqrc:/2936851104/UntitledProject1Content/Screen01.ui.qml:12 module \"FlowView\" is not installed\n"