Failed to find required Qt component "PdfWidgets".

CMake Error at qtdoc/examples/demos/documentviewer/plugins/pdfviewer/CMakeLists.txt:4 (find_package):
Found package configuration file:
C:/Users/qt/work/qt/qt5/qtbase/lib/cmake/Qt6/Qt6Config.cmake
but it set Qt6_FOUND to FALSE so package "Qt6" is considered to be NOT
FOUND.  Reason given by package:
Failed to find required Qt component "PdfWidgets".
Expected Config file at
"C:/Users/qt/work/qt/qt5/qtbase/lib/cmake/Qt6PdfWidgets/Qt6PdfWidgetsConfig.cmake"
does NOT exist