error: field ‘responseHeaders’ has incomplete type ‘QMultiMap<QByteArray, QByteArray>’

/home/qt/work/qt/qtwebengine/src/core/web_contents_delegate_qt.h:204:43: error: field ‘responseHeaders’ has incomplete type ‘QMultiMap<QByteArray, QByteArray>’
  204 |         QMultiMap<QByteArray, QByteArray> responseHeaders;
      |                                           ^~~~~~~~~~~~~~~
In file included from /home/qt/work/install/target/include/QtCore/qtypeinfo.h:9,
                 from /home/qt/work/install/target/include/QtCore/qglobal.h:47,
                 from /home/qt/work/qt/qtwebengine/src/core/build_config_qt.h:7,
                 from /home/qt/work/qt/qtwebengine/src/core/net/webui_controller_factory_qt.cpp:11:
/home/qt/work/install/target/include/QtCore/qcontainerfwd.h:23:43: note: declaration of ‘class QMultiMap<QByteArray, QByteArray>’
   23 | template <typename Key, typename T> class QMultiMap;
      |                                           ^~~~~~~~~
cc1plus: note: unrecognized command-line option ‘-Wno-stringop-overread’ may have been intended to silence earlier diagnostics
Sccache command failed, re-try calling build tool directly
In file included from /home/qt/work/qt/qtwebengine/src/core/devtools_frontend_qt.h:10,
                 from /home/qt/work/qt/qtwebengine/src/core/net/webui_controller_factory_qt.cpp:12:
/home/qt/work/qt/qtwebengine/src/core/web_contents_delegate_qt.h:204:43: error: field ‘responseHeaders’ has incomplete type ‘QMultiMap<QByteArray, QByteArray>’
  204 |         QMultiMap<QByteArray, QByteArray> responseHeaders;
      |                                           ^~~~~~~~~~~~~~~
In file included from /home/qt/work/install/target/include/QtCore/qtypeinfo.h:9,
                 from /home/qt/work/install/target/include/QtCore/qglobal.h:47,
                 from /home/qt/work/qt/qtwebengine/src/core/build_config_qt.h:7,
                 from /home/qt/work/qt/qtwebengine/src/core/net/webui_controller_factory_qt.cpp:11:
/home/qt/work/install/target/include/QtCore/qcontainerfwd.h:23:43: note: declaration of ‘class QMultiMap<QByteArray, QByteArray>’
   23 | template <typename Key, typename T> class QMultiMap;
      |                                           ^~~~~~~~~
cc1plus: note: unrecognized command-line option ‘-Wno-stringop-overread’ may have been intended to silence earlier diagnostics
[28294/28741] CXX obj/QtWebEngineCore/web_engine_page_host.o
[28295/28741] CXX obj/QtWebEngineCore/touch_handle_drawable_qt.o
[28296/28741] CXX obj/QtWebEngineCore/select_file_dialog_factory_qt.o
[28297/28741] CXX obj/QtWebEngineCore/touch_selection_controller_client_qt.o
ninja: build stopped: subcommand failed.