Qt5.8: network/multistreamclient and multistreamserver not compiling

g++ -c -pipe -g -std=gnu++11 -Wall -W -D_REENTRANT -fPIC -DQT_QML_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I../multistreamclient -I. -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/include -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/include/QtWidgets -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/include/QtGui -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/include/QtNetwork -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/include/QtCore -I. -isystem /usr/include/libdrm -I/home/joaijala/data/Qt/Qt5.8.0_ent_597/5.8/gcc_64/mkspecs/linux-g++ -o client.o ../multistreamclient/client.cpp
In file included from ../multistreamclient/client.cpp:54:0:
../multistreamclient/client.h:85:5: error: ‘QSctpSocket’ does not name a type
     QSctpSocket *sctpSocket;
     ^
../multistreamclient/client.cpp: In constructor ‘Client::Client(QWidget*)’:
../multistreamclient/client.cpp:67:5: error: ‘sctpSocket’ was not declared in this scope
     sctpSocket = new QSctpSocket(this);
     ^
../multistreamclient/client.cpp:67:22: error: expected type-specifier before ‘QSctpSocket’
     sctpSocket = new QSctpSocket(this);
                      ^
../multistreamclient/client.cpp:67:22: error: expected ‘;’ before ‘QSctpSocket’
../multistreamclient/client.cpp:126:26: error: ‘QSctpSocket’ has not been declared
     connect(sctpSocket, &QSctpSocket::connected, this, &Client::connected);
                          ^
../multistreamclient/client.cpp:127:26: error: ‘QSctpSocket’ has not been declared
     connect(sctpSocket, &QSctpSocket::disconnected, this, &Client::disconnected);
                          ^
../multistreamclient/client.cpp:128:26: error: ‘QSctpSocket’ has not been declared
     connect(sctpSocket, &QSctpSocket::channelReadyRead, this, &Client::readDatagram);
                          ^
../multistreamclient/client.cpp: In destructor ‘virtual Client::~Client()’:
../multistreamclient/client.cpp:153:12: error: ‘sctpSocket’ was not declared in this scope
     delete sctpSocket;
            ^
../multistreamclient/client.cpp: In member function ‘void Client::disconnected()’:
../multistreamclient/client.cpp:166:5: error: ‘sctpSocket’ was not declared in this scope
     sctpSocket->close();
     ^
../multistreamclient/client.cpp: In member function ‘void Client::requestConnect()’:
../multistreamclient/client.cpp:172:5: error: ‘sctpSocket’ was not declared in this scope
     sctpSocket->abort();
     ^
../multistreamclient/client.cpp: In member function ‘void Client::readDatagram(int)’:
../multistreamclient/client.cpp:179:5: error: ‘sctpSocket’ was not declared in this scope
     sctpSocket->setCurrentReadChannel(channel);
     ^
../multistreamclient/client.cpp: In member function ‘void Client::displayError(QAbstractSocket::SocketError)’:
../multistreamclient/client.cpp:201:39: error: ‘sctpSocket’ was not declared in this scope
                                  .arg(sctpSocket->errorString()));
                                       ^
../multistreamclient/client.cpp: In member function ‘void Client::writeDatagram(const QByteArray&)’:
../multistreamclient/client.cpp:215:9: error: ‘sctpSocket’ was not declared in this scope
     if (sctpSocket->isValid() && sctpSocket->state() == QAbstractSocket::ConnectedState) {
         ^
make: *** [client.o] Error 1
08:54:09: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project multistreamclient (kit: Desktop Qt 5.8.0 GCC 64bit)
When executing step "Make"

../multistreamserver/server.cpp: In constructor ‘Server::Server(QWidget*)’:
../multistreamserver/server.cpp:68:38: error: invalid use of incomplete type ‘class QSctpServer’
     sctpServer = new QSctpServer(this);
                                      ^
In file included from ../multistreamserver/server.cpp:55:0:
../multistreamserver/server.h:59:7: error: forward declaration of ‘class QSctpServer’
 class QSctpServer;
       ^
../multistreamserver/server.cpp:69:15: error: invalid use of incomplete type ‘class QSctpServer’
     sctpServer->setMaximumChannelCount(NumberOfChannels);
               ^
In file included from ../multistreamserver/server.cpp:55:0:
../multistreamserver/server.h:59:7: error: forward declaration of ‘class QSctpServer’
 class QSctpServer;
       ^
../multistreamserver/server.cpp:78:26: error: incomplete type ‘QSctpServer’ used in nested name specifier
     connect(sctpServer, &QSctpServer::newConnection, this, &Server::newConnection);
                          ^
[log cutted here]