i met same problem.
my CMAKElists.txt
cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
project(example-app)

list(APPEND CMAKE_PREFIX_PATH "D:/pp_extension/libtorch-win-shared-with-deps-debug-1.5.1+cpu/libtorch")

find_package(Torch REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")

add_executable(example-app main.cpp)
target_link_libraries(example-app "${TORCH_LIBRARIES}")
set_property(TARGET example-app PROPERTY CXX_STANDARD 14)
if (MSVC)
    file(GLOB TORCH_DLLS "${TORCH_INSTALL_PREFIX}/lib/*.dll")
    add_custom_command(TARGET example-app
            POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy_if_different
            ${TORCH_DLLS}
            $<TARGET_FILE_DIR:example-app>)
endif (MSVC)

but it did not work