Same result if I just use heartrate-game example and substitute UUID with our own ID. It is not possible to discover service, internal error happends.

code looks like:
....
pqservice=p_lecontroller->createServiceObject( aserviceid );
if(pqservice)
{ connect(pqservice, &QLowEnergyService::characteristicRead,
this, &BLEService::characteristicRead);
connect(pqservice, &QLowEnergyService::characteristicWritten,
this, &BLEService::characteristicWritten);
connect(pqservice, &QLowEnergyService::stateChanged,
this, &BLEService::stateChanged);
connect(pqservice, &QLowEnergyService::errorOccurred,
this, &BLEService::errorOccurred);
connect(pqservice, &QLowEnergyService::descriptorWritten,
this, &BLEService::descriptorWritten);
connect(pqservice, &QLowEnergyService::descriptorRead,
this, &BLEService::descriptorRead);
connect(pqservice, &QLowEnergyService::characteristicChanged,
this, &BLEService::characteristicChanged);
pqservice->discoverDetails(QLowEnergyService::SkipValueDiscovery);

then calback called:

void BLEService::stateChanged(QLowEnergyService::ServiceState newState)
{ switch (newState)
{ case QLowEnergyService::RemoteServiceDiscovered:
qDebug()<<" RemoteServiceDiscovered ";

and after that

void BLEService::errorOccurred(QLowEnergyService::ServiceError newError)
{ qDebug()<<" QLowEnergyService errorOccurred ";
switch(newError)
{
case QLowEnergyService::UnknownError:
qDebug()<<"UnknownError";
break;

To be sure it is not problem of driver or device, i used "BluetoothLE example" from Microsoft for UWP build on VS 2022 on W10, same controller, same device, same UUID works without problems.

Output is:

*RemoteServiceDiscovering
onecoreuap\drivers\wdm\bluetooth\user\winrt\gatt\gattdeviceservice.cpp(1386)\Windows.Devices.Bluetooth.dll!00007FFCF98BDEBB: (caller: 00007FFCF98BD212) Exception(1) tid(4d2c) 80070020 The process cannot access the file because it is being used by another process.

Exception at 0x7ffd4790cd29, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in Windows_Devices_Bluetooth

Exception at 0x7ffd4790cd29, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in Windows_Devices_Bluetooth
onecoreuap\drivers\wdm\bluetooth\user\winrt\gatt\gattdeviceservice.cpp(1197)\Windows.Devices.Bluetooth.dll!00007FFCF99893C4: (caller: 00007FFCF98BEB43) ReturnHr(37) tid(4d2c) 80070020 The process cannot access the file because it is being used by another process.
Msg:[onecoreuap\drivers\wdm\bluetooth\user\winrt\gatt\gattdeviceservice.cpp(1386)\Windows.Devices.Bluetooth.dll!00007FFCF98BDEBB: (caller: 00007FFCF98BD212) Exception(1) tid(4d2c) 80070020 The process cannot access the file because it is being used by another process.
]
onecoreuap\drivers\wdm\bluetooth\user\winrt\gatt\gattdeviceservice.cpp(1593)\Windows.Devices.Bluetooth.dll!00007FFCF98BF38B: (caller: 00007FFCF98C485F) Exception(2) tid(4d2c) 80070020 The process cannot access the file because it is being used by another process.

Exception at 0x7ffd4790cd29, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in Windows_Devices_Bluetooth

Exception at 0x7ffd4790cd29, code: 0xe06d7363: C++ exception, flags=0x1 (execution cannot be continued) (first chance) in Windows_Devices_Bluetooth
QLowEnergyService errorOccurred
UnknownError*