Qt Creator installer endless loop w/o internet

IFW Version: 3.0.4, built with Qt 5.9.0.
Build date: Mar 23 2018
Installer Framework SHA1: 0d6af6f
[0] Language: hu-HU
[0] Arguments: qt-creator-opensource-windows-x86_64-4.6.0.exe, -v
[4] Operations sanity check succeeded.
[5] Reading Qt Account settings from disk: "C:/Users/user/AppData/Roaming/Qt/qtaccount.ini"
[5] Qt Account settings file [C:\\Users\\user\\AppData\\Roaming\\Qt\\qtaccount.ini] does not exist.
[5] QtAccount information:
[5] Login completed: false
[5] Email: ""
[5] Total number of licenses: 0
[5] Account type: 3
[5] Resource tree:
[5]      :/translations
[5]      :/translations/ifw_zh_CN.qm
[5]      :/translations/qt_da.qm
[5]      :/translations/qt_de.qm
[5]      :/translations/qt_en.qm
[5]      :/translations/qt_es.qm
[5]      :/translations/qt_fr.qm
[6]      :/translations/qt_ja.qm
[6]      :/translations/qt_it.qm
[6]      :/translations/qt_pl.qm
[6]      :/translations/qt_ru.qm
[6]      :/translations/ifw_de.qm
[6]      :/translations/ifw_da.qm
[6]      :/translations/ifw_es.qm
[6]      :/translations/ifw_en.qm
[6]      :/translations/ifw_fr.qm
[6]      :/translations/ifw_it.qm
[6]      :/translations/ifw_ja.qm
[6]      :/translations/ifw_pl.qm
[6]      :/translations/ifw_ru.qm
[6]      :/translations/qt_zh_CN.qm
[6]      :/files-to-patch-macx-emb-arm-qt5
[6]      :/files-to-patch-windows
[6]      :/files-to-patch-linux-emb-arm-qt5
[6]      :/files-to-patch-windows-emb-arm
[6]      :/files-to-patch-linux-qt5
[6]      :/files-to-patch-windows-qt5
[6]      :/files-to-patch-linux-emb-arm
[6]      :/files-to-patch-windows-emb-arm-qt5
[6]      :/files-to-patch-macx
[6]      :/files-to-patch-macx-qt5
[6]      :/files-to-patch-linux
[6]      :/uninstall.png
[6]      :/installer.png
[6]      :/installer.ico
[6]      :/keepinstalled.png
[6]      :/installer.icns
[6]      :/install.png
[6]      :/keepuninstalled.png
[8]      :/metadata
[8]      :/metadata/qt.tools.qtcreator
[8]      :/metadata/qt.tools.qtcreator/launchqtcreatorcheckboxform.ui
[8]      :/metadata/qt.tools.qtcreator/associatecommonfiletypesform.ui
[8]      :/metadata/qt.tools.qtcreator/installscript.qs
[8]      :/metadata/qt.license.gplv3except
[8]      :/metadata/qt.license.gplv3except/LICENSE.GPL3-EXCEPT
[8]      :/metadata/qt.tools.vcredist_msvc2015_x86
[8]      :/metadata/qt.tools.vcredist_msvc2015_x86/installscript.qs
[8]      :/metadata/qt.tools.vcredist_msvc2015_x64
[8]      :/metadata/qt.tools.vcredist_msvc2015_x64/installscript.qs
[8]      :/metadata/config
[8]      :/metadata/config/config-internal.ini
[8]      :/metadata/installer-config
[8]      :/metadata/installer-config/watermark_png.png
[8]      :/metadata/installer-config/config.xml
[8]      :/metadata/installer-config/logo-small.ico
[8]      :/metadata/qt.tools
[8]      :/metadata/qt.tools/installscript.qs
[8]      :/metadata/rccprojectdf3372.qrc
[8]      :/metadata/Updates.xml
[8]      :/metadata/qt.license.python
[8]      :/metadata/qt.license.python/LICENSE.PYTHON
[49047] Created question message box "cancelInstallation": "Qt Creator 4.6.0 (64 bit) Question", "Do you want to quit the installer application?"