[REG 6.5.0 RC1->RC2] configure fails for quick/webengineaction

6.5.0/gcc_64/bin/qt-cmake -S /home/qt/RTA/Qt_6.5.0/Examples/Qt-6.5.0/quick/webengineaction -B /home/qt/RTA/Qt_6.5.0/Examples/Qt-6.5.0/quick/webengineaction/bld_gcc_64 -GNinja 

CMake Error at CMakeLists.txt:10 (qt_internal_add_manual_test):
-- The CXX compiler identification is GNU 10.4.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE  
-- Performing Test HAVE_STDATOMIC
-- Performing Test HAVE_STDATOMIC - Success
-- Found WrapAtomic: TRUE  
-- Found OpenGL: /usr/lib64/libOpenGL.so   
-- Found WrapOpenGL: TRUE  
-- Found XKB: /usr/lib64/libxkbcommon.so (found suitable version "1.3.0", minimum required is "0.5.0") 
-- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
-- Could NOT find WrapVulkanHeaders (missing: Vulkan_INCLUDE_DIR) 
CMake Error at CMakeLists.txt:10 (qt_internal_add_manual_test):
  Unknown CMake command "qt_internal_add_manual_test".