\rounds.h:56: ошибка: no matching function for call to 'QObject::connect(QTimer*&, const char [11], CCClass* const, const char [14])'
QObject::connect(Timer, SIGNAL(timeout()), this, SLOT(Time()));
class Round : public QDialog //или другой Qt класс
{
Q_OBJECT
//...
connect(sender, &Sender::signal, receiver, &Receiver::slot);