Examples not finding QtConcurrent

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Checking for updated license succeeded (1 licenses fetched)
Project MESSAGE: This project is using private headers and will therefore be tied to this specific Qt module build version.
Project MESSAGE: Running this project against other versions of the Qt modules may crash at any arbitrary point.
Project MESSAGE: This is not a bug, but a result of using Qt internals. You have been warned!
Project MESSAGE: This project is using private headers and will therefore be tied to this specific Qt module build version.
Project MESSAGE: Running this project against other versions of the Qt modules may crash at any arbitrary point.
Project MESSAGE: This is not a bug, but a result of using Qt internals. You have been warned!
Project MESSAGE: This project is using private headers and will therefore be tied to this specific Qt module build version.
Project MESSAGE: Running this project against other versions of the Qt modules may crash at any arbitrary point.
Project MESSAGE: This is not a bug, but a result of using Qt internals. You have been warned!
Running /home/johanna/RTA/qt5/Tools/CMake/bin/cmake -S /home/johanna/RTA/qt5/Examples/Qt-6.1.0/qt3d/qardboard -B /home/johanna/RTA/qt5/Examples/Qt-6.1.0/qt3d/qardboard in /home/johanna/RTA/qt5/Examples/Qt-6.1.0/qt3d/qardboard.
-- Could NOT find Vulkan (missing: Vulkan_LIBRARY Vulkan_INCLUDE_DIR) 
-- Could NOT find Vulkan (missing: Vulkan_LIBRARY Vulkan_INCLUDE_DIR) 
-- Configuring done
CMake Error at /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:508 (add_executable):
  Target "qardboard" links to target "Qt::Concurrent" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
Call Stack (most recent call first):
  /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:475 (_qt_internal_create_executable)
  /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:566 (qt6_add_executable)
  CMakeLists.txt:29 (qt_add_executable)
CMake Error at /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:508 (add_executable):
  Target "qardboard" links to target "Qt::Concurrent" but the target was not
  found.  Perhaps a find_package() call is missing for an IMPORTED target, or
  an ALIAS target is missing?
Call Stack (most recent call first):
  /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:475 (_qt_internal_create_executable)
  /home/johanna/RTA/qt5/6.1.0/gcc_64/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:566 (qt6_add_executable)
  CMakeLists.txt:29 (qt_add_executable)
-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.
CMake process exited with exit code 1.
Elapsed time: 00:00.