QGlib::Value::set: Unable to handle value type "gchararray".

[JoeCFD]

the warning is displayed when my qt-5.9.5 app is launched on ubuntu 18
QGlib::Value::set: Unable to handle value type "gchararray". This Value instance has been initialized to hold values of type "guint" and no conversion is possible

Can not find clue online. Does anyone have the same issue?