Annoying warning message only with PySide 6.6.3

PySide 6.6.2 does not print any warning message when I launch my chess GUI app. Now, after I've upgraded to PySide 6.6.3 without any changes to the code, I get this annoying warning message at launch:

No QtMultimedia backends found. Only QMediaDevices, QAudioDevice, QSoundEffect, QAudioSink, and QAudioSource are available.

I'm using `QSoundEffect` for playing sound effects in my chess GUI app.

If I print the return value of the `audioDevice()` method, called on the instance of the `QSoundEffect` class, I get this output in the console:

`<PySide6.QtMultimedia.QAudioDevice object at 0x00000261F40F8A00>`

So, an audio device is automatically created by the `QSoundEffect` instance and the sound effects are playing normally in my chess GUI app, so I don't know why am I getting that annoying warning message.