[BLE]: QBluetoothLocalDevice::requestPairing() don't work fine.

Hello,

I'm facing a problem when I try to pair my Qt application with a device using Bluetooth Low Energy. The function QBluetoothLocalDevice::requestPairing() do not work and return a "Pairing error". I tried with many devices but same results. I also tried with Qt example such as "btscanner"...
Maybe the issue comes from my code (I can publish the affected part). But even if it's that, there isn't not a lot of information in Qt documentation about that subject...
Is there a way for you to inspect in that direction? Or maybe more explain in the doc?

Thank you for your time.