Example not compiling due 'error: ‘sctpSocket’ was not declared in this scope; did you mean ‘QSctpSocket’'

| QSctpSocket
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp: In member function ‘void Client::readDatagram(int)’:
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp:178:5: error: ‘sctpSocket’ was not declared in this scope; did you mean ‘QSctpSocket’?
 178 | sctpSocket->setCurrentReadChannel(channel);
 | ^~~~~~~~~~
 | QSctpSocket
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp: In member function ‘void Client::displayError(QAbstractSocket::SocketError)’:
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp:200:39: error: ‘sctpSocket’ was not declared in this scope; did you mean ‘QSctpSocket’?
 200 | .arg(sctpSocket->errorString()));
 | ^~~~~~~~~~
 | QSctpSocket
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp: In member function ‘void Client::writeDatagram(const QByteArray&)’:
/home/qt/RTA/qt5/Examples/Qt-6.0.0/network/multistreamclient/client.cpp:214:9: error: ‘sctpSocket’ was not declared in this scope; did you mean ‘QSctpSocket’?
 214 | if (sctpSocket->isValid() && sctpSocket->state() == QAbstractSocket::ConnectedState) {
 | ^~~~~~~~~~
 | QSctpSocket
make[2]: *** [CMakeFiles/multistreamclient.dir/build.make:108: CMakeFiles/multistreamclient.dir/client.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:96: CMakeFiles/multistreamclient.dir/all] Error 2
make: *** [Makefile:149: all] Error 2