Build and Run hello_xr Sample App Error

I am having the same error following the BUILDING.MD in Ubuntu.

-- Performing Test HAVE_FILESYSTEM_NEEDING_LIBCXXFS - Failed
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so   
-- Enabling OpenGL support
-- Found Vulkan: /usr/lib/x86_64-linux-gnu/libvulkan.so  
-- Enabling Vulkan support
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE  
-- Could NOT find JsonCpp (missing: JsonCpp_INCLUDE_DIR JsonCpp_LIBRARY) 
CMake Error at src/CMakeLists.txt:117 (set_property):
  set_property could not find TARGET OpenXR::openxr_loader.  Perhaps it has
  not yet been created.

 Did you find a fix?