Setting CAN bus bitrate with socketcan returns error

Using the socketcan plugin, setting CAN bus bitrate like

canDevice->setConfigurationParameter(QCanBusDevice::BitRateKey, 1000000);

returns message

qt.canbus.plugins.socketcan: Cannot apply parameter: 4 with value: 1000000

Libsocketcan is installed, application has root rights.

Can be reproduced using the can example in module serialbus: [CAN Bus example | Qt Serial Bus 5.15.2|https://doc.qt.io/qt-5/qtserialbus-can-example.html] 

• start the application with root rights
• in the connector:
  • select plugin socketcan
  • specify can interface can0
  • click "ok" to connect

See also: Qt Forum thread