__link__ | Qt-opensource-windows-x86-5.15.2.exe

You are trying to run your .exe outside Qt Creator without copying the required DLLs. Fix: Use the windeployqt tool. Open a Qt command prompt:

: Qt 5.15.2 supports older versions of Windows and compilers that might not be compatible with the stricter requirements of Qt 6. qt-opensource-windows-x86-5.15.2.exe

After Qt 5.15.2, the Qt Company changed its distribution model. While Qt 5.15.3+ (LTS) exists, those are exclusively available to paying commercial customers or require a cumbersome online installer that forces account creation. qt-opensource-windows-x86-5.15.2.exe requires , no persistent internet connection , and no nagging about commercial trials. You are trying to run your