Qt unattended installation with --script silently exists without any errors

I'm trying to install a selected Qt component with unattended installation mode and `.qs` script file:

C:\> qt-unified-windows-x86-3.1.1-online.exe --verbose --script qt-installer-windows.qs

However, the installer immediately exits without any errors:

IFW Version: 3.1.1, built with Qt 5.9.5.
Build date: May 14 2019
Installer Framework SHA1: 82b0f5b
[0] Language: en-GB
[0] Arguments: qt-unified-windows-x86-3.1.1-online.exe, --verbose, --script, qt-installer-windows.qs
[3] Operations sanity check succeeded.
[4] Reading Qt Account settings from disk: "C:/Users/user1/AppData/Roaming/Qt/qtaccount.ini"
[4] QtAccount information:
[4] Login completed: false
[5] Email: ""
[5] Total number of licenses: 0
[5] Account type: 3
[5] Resource tree:
[6] :/translations
[6] :/translations/ifw_zh_CN.qm
[6] :/translations/qt_da.qm
[6] :/translations/qt_de.qm
[6] :/translations/qt_en.qm
[6] :/translations/qt_es.qm
[6] :/translations/qt_fr.qm
[6] :/translations/qt_ja.qm
[6] :/translations/qt_it.qm
[6] :/translations/qt_pl.qm
[6] :/translations/qt_ru.qm
[7] :/translations/ifw_de.qm
[7] :/translations/ifw_da.qm
[7] :/translations/ifw_es.qm
[7] :/translations/ifw_en.qm
[7] :/translations/ifw_fr.qm
[7] :/translations/ifw_it.qm
[7] :/translations/ifw_ja.qm
[7] :/translations/ifw_pl.qm
[7] :/translations/ifw_ru.qm
[7] :/translations/qt_zh_CN.qm
[7] :/files-to-patch-macx-emb-arm-qt5
[7] :/files-to-patch-windows
[8] :/files-to-patch-linux-emb-arm-qt5
[8] :/files-to-patch-windows-emb-arm
[8] :/files-to-patch-linux-qt5
[9] :/files-to-patch-windows-qt5
[15] :/files-to-patch-linux-emb-arm
[16] :/files-to-patch-windows-emb-arm-qt5
[19] :/files-to-patch-macx
[20] :/files-to-patch-macx-qt5
[21] :/files-to-patch-linux
[21] :/uninstall.png
[22] :/installer.png
[22] :/installer.ico
[24] :/keepinstalled.png
[26] :/installer.icns
[30] :/install.png
[31] :/keepuninstalled.png
[33] :/metadata
[33] :/metadata/config
[33] :/metadata/config/config-internal.ini
[34] :/metadata/installer-config
[34] :/metadata/installer-config/watermark_png.png
[35] :/metadata/installer-config/config.xml
[37] :/metadata/installer-config/logo-small.ico
[38] :/metadata/Updates.xml
[39] :/metadata/rccprojectdf5964.qrc

qt-installer-windows.qs is attached.

Could you please suggest what am I doing wrong?

Thank you!