Doesn't work for Qt-based projects?

[Anton-V-K]

I've tried to use pre-built Molebox VS (Version 4.6000, referenced at other site) for the application created with Qt.
Everything gets packed fine (without errors). But unfortunately the application can't start and shows the error:

This application failed to start because it could not find or load the Qt platform plugin "windows"
in "".

The MXB-script is straightforward:

;MOLEBOX CONFIG SCRIPT 1.0
<options>
target=FolderViewer.exe
source=build-Desktop_32bit-Release\release\FolderViewer.exe
isexecutable=yes
dologging=yes
usevreg=yes
buildvreg=yes
relink=yes
compatible=no
saveiat=yes
regmask=*.reg
autoreg=2
<files>
build-Desktop_32bit-Release\release\msvcp140.dll;msvcp140.dll
build-Desktop_32bit-Release\release\Qt5Core.dll;Qt5Core.dll
build-Desktop_32bit-Release\release\Qt5Gui.dll;Qt5Gui.dll
build-Desktop_32bit-Release\release\Qt5Widgets.dll;Qt5Widgets.dll
build-Desktop_32bit-Release\release\Qt5Xml.dll;Qt5Xml.dll
build-Desktop_32bit-Release\release\vcruntime140.dll;vcruntime140.dll
build-Desktop_32bit-Release\release\platforms\qwindows.dll;platforms/qwindows.dll
<end>

Using absolute paths has no positive effect.
The generated log file doesn't reveal any issues, and qwindows.dll isn't mentioned there at all.
I run "boxed" app on Windows 7.
Has anyone succeeded with using Molebox for Qt-based applications?