QML in Android application is stopped with use downloadmanager example

I created the application from template QML stack view
By making this instruction https://doc.qt.io/qt-5/qtqml-cppintegration-topic.html
I will added a class for access cpp code from QML page
I added the example /Qt/Examples/Qt-5.12.4/network/downloadmanager
I built and launched the desktop application on Linux. It works and downloads files
I build apk and install to phone. Application upon startup, is terminates immediately.

In forum link

Sources

Log android attached

Feature request:
Put this code in examples in next release as examples Qt/qml-downloadmanager
Adding in the graphical mode: for see the progress bar of the loading file and status - result of download directly on the form. Recieved by CPP code from downloader.cpp file class.

This is code is not work on apk (Android)
I think, the idea about: improove this code and add progress bar to QML then file download and status. And in next release add to Examples folder. Qml+cpp+downloader