examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:77:10: error: ‘QFile’ has not been declared

/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o -c examples/opcua/waterpump/waterpump-qmlcpp/main.cpp
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp: In function ‘int main(int, char**)’:
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:77:10: error: ‘QFile’ has not been declared
    77 |     if (!QFile::exists(serverExePath)) {
       |          ^~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:82:5: error: ‘QProcess’ was not declared in this scope
 
 6239: [173/186] sccache /usr/bin/g++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NAMESPACE=TestNamespace -DQT_NETWORK_LIB -DQT_OPCUA_LIB -DQT_OPENGL_LIB -DQT_QMLMODELS_LIB -DQT_QML_LIB -DQT_QUICK_LIB -Iexamples/opcua/waterpump/waterpump-qmlcpp -Iexamples/opcua/waterpump/waterpump-qmlcpp/waterpump-qmlcpp_autogen/include -Iinclude -Iinclude/QtOpcUa -isystem /home/qt/work/install/include/QtCore -isystem /home/qt/work/install/include -isystem /home/qt/work/install/mkspecs/linux-g++ -isystem /home/qt/work/install/include/QtGui -isystem /home/qt/work/install/include/QtNetwork -isystem /home/qt/work/install/include/QtQuick -isystem /home/qt/work/install/include/QtQml -isystem /home/qt/work/install/include/QtQmlModels -isystem /home/qt/work/install/include/QtOpenGL -g -fPIE -Wall -Wextra -fPIC -pthread -std=gnu++17 -MD -MT examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o -MF examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o.d -o examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o -c examples/opcua/waterpump/waterpump-qmlcpp/main.cpp
 FAILED: examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o
 sccache /usr/bin/g++ -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NAMESPACE=TestNamespace -DQT_NETWORK_LIB -DQT_OPCUA_LIB -DQT_OPENGL_LIB -DQT_QMLMODELS_LIB -DQT_QML_LIB -DQT_QUICK_LIB -Iexamples/opcua/waterpump/waterpump-qmlcpp -Iexamples/opcua/waterpump/waterpump-qmlcpp/waterpump-qmlcpp_autogen/include -Iinclude -Iinclude/QtOpcUa -isystem /home/qt/work/install/include/QtCore -isystem /home/qt/work/install/include -isystem /home/qt/work/install/mkspecs/linux-g++ -isystem /home/qt/work/install/include/QtGui -isystem /home/qt/work/install/include/QtNetwork -isystem /home/qt/work/install/include/QtQuick -isystem /home/qt/work/install/include/QtQml -isystem /home/qt/work/install/include/QtQmlModels -isystem /home/qt/work/install/include/QtOpenGL -g -fPIE -Wall -Wextra -fPIC -pthread -std=gnu++17 -MD -MT examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o -MF examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o.d -o examples/opcua/waterpump/waterpump-qmlcpp/CMakeFiles/waterpump-qmlcpp.dir/main.cpp.o -c examples/opcua/waterpump/waterpump-qmlcpp/main.cpp
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp: In function ‘int main(int, char**)’:
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:77:10: error: ‘QFile’ has not been declared
    77 |     if (!QFile::exists(serverExePath)) {
       |          ^~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:82:5: error: ‘QProcess’ was not declared in this scope
    82 |     QProcess serverProcess;
       |     ^~~~~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:84:5: error: ‘serverProcess’ was not declared in this scope
 
 6242: examples/opcua/waterpump/waterpump-qmlcpp/main.cpp: In function ‘int main(int, char**)’:
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:77:10: error: ‘QFile’ has not been declared
    77 |     if (!QFile::exists(serverExePath)) {
       |          ^~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:82:5: error: ‘QProcess’ was not declared in this scope
    82 |     QProcess serverProcess;
       |     ^~~~~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:84:5: error: ‘serverProcess’ was not declared in this scope
    84 |     serverProcess.start(serverExePath);
       |     ^~~~~~~~~~~~~
 examples/opcua/waterpump/waterpump-qmlcpp/main.cpp:99:34: error: ‘QProcess’ is not a class, namespace, or enumeration