Qt6 LottieQt Application Won't Launch After Deployment (Windows 10)

[tuhlnaa]

Environment

• Operating System: Windows 10
• Qt Version: 6.9.0 msvc2022_64
• Compiler: MSVC 2022 (64-bit)
• Application Type: QML application using Qt.labs.lottieqt 1.0

Issue Description

I'm developing a Qt QML application that uses LottieQt for animations. The application builds successfully and runs fine within Qt Creator. However, when I deploy it using windeployqt and try to run the standalone executable, the application window does not open. There are no visible error messages.

Initially, windeployqt showed the following warning:

Warning: Cannot find any version of the dxcompiler.dll and dxil.dll.

I've addressed this by downloading the DirectX Shader Compiler and adding the x64 directory containing dxcompiler.dll and dxil.dll to my system PATH. This made the warning disappear, but the application still won't launch after deployment.

What I've Tried

1. Downloaded the DirectX Shader Compiler and added the bin/x64 directory to my system PATH
2. Confirmed that the application works fine when I remove the LottieQt code

Deployment Command

windeployqt --dir "D:\Qt-exe-distribution-test" appuntitled1.exe -qmldir C:\Qt\6.9.0\msvc2022_64\qml

Code

import QtQuick
import QtQuick.Effects
import QtQuick.Controls
import QtQuick.Controls.Material
import QtQuick.Layouts
import Qt.labs.platform // For FileDialog
import Qt.labs.lottieqt 1.0

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    // Other UI components...

    LottieAnimation {
        quality: LottieAnimation.MediumQuality
        source: "qrc:/resources/circle-animation.json"
        loops: LottieAnimation.Infinite
        autoPlay: true
        onStatusChanged: {
            if (status === LottieAnimation.Ready) {
                // any activities needed before
                // playing starts go here
                gotoAndPlay(startFrame);
            }
        }
        onFinished: {
            console.log("Finished playing")
        }
    }
}

Any help or suggestions would be greatly appreciated.

Thank you!