QT请求QObject::connect: No such slot BackEnd::RequestReceived

Ошибка Object::connect: No such slot - C++ Qt - Киберфорум qobject__connect_ no such slot gons@localhost:~> qdvdauthor QEventLoop: Cannot be used without QApplication : QObject::connect: No such signal QAction:: ninjajago slot QObject::connect: No such slot MainWindow::PingCounter() QObject::connect: I watched in moc_main_

fruit million slot QObject::connect: No such slot FenCalculatrice::FenCalculatrice::calculerOperation() in Designer_training: 10 QObject