examples/grpc/magic8ball/clientservice.cpp:26:14: error: invalid use of incomplete type ‘class QDebug’

 /home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp: In member function ‘void ClientService::errorOccurred()’:
/home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp:26:14: error: invalid use of incomplete type ‘class QDebug’
   26 |     qWarning() << "Connection error occurred. Have you started server part:"
      |              ^
In file included from /home/qt/work/install/target/include/QtCore/qglobal.h:47,
                 from /home/qt/work/install/target/include/QtCore/qnamespace.h:12,
                 from /home/qt/work/install/target/include/QtCore/qobjectdefs.h:12,
                 from /home/qt/work/install/target/include/QtCore/qobject.h:10,
                 from /home/qt/work/install/target/include/QtCore/QObject:1,
                 from /home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.h:7,
                 from /home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp:4:
/home/qt/work/install/target/include/QtCore/qtypeinfo.h:17:7: note: forward declaration of ‘class QDebug’
   17 | class QDebug;
      |       ^~~~~~
Sccache command failed, re-try calling build tool directly
/home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp: In member function ‘void ClientService::errorOccurred()’:
/home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp:26:14: error: invalid use of incomplete type ‘class QDebug’
   26 |     qWarning() << "Connection error occurred. Have you started server part:"
      |              ^
In file included from /home/qt/work/install/target/include/QtCore/qglobal.h:47,
                 from /home/qt/work/install/target/include/QtCore/qnamespace.h:12,
                 from /home/qt/work/install/target/include/QtCore/qobjectdefs.h:12,
                 from /home/qt/work/install/target/include/QtCore/qobject.h:10,
                 from /home/qt/work/install/target/include/QtCore/QObject:1,
                 from /home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.h:7,
                 from /home/qt/work/qt/qtgrpc/examples/grpc/magic8ball/clientservice.cpp:4:
/home/qt/work/install/target/include/QtCore/qtypeinfo.h:17:7: note: forward declaration of ‘class QDebug’
   17 | class QDebug;
      |       ^~~~~~