How to connect to one Matlab shared session with multiple threads from C++?

I created a Matlab shared session using this command in the Matlab Desktop(R2021a):
matlab.engine.shareEngine("mySession");
Then I want to connect it from multi-play threads from C++:
using namespace std::chrono_literals;

void thread(std::u16string const &sessionName)
{
matlab::engine::connectMATLAB(sessionName);
std::this_thread::sleep_for(10s);
}

int main()
{
std::thread _1(thread, std::u16string(u"mySession"));
std::thread _2(thread, std::u16string(u"mySession"));

_1.join();
_2.join();
}
And I got:
terminate called after throwing an instance of 'matlab::engine::EngineException'
what(): MATLAB session cannot be connected.
How could I do that? It's possible?
My Environment:
OS: Fedora 34
Kernel: Linux 5.15.4
Compiler: GCC 11.2.1
Compiler Additional Flags: -std=c++14 -lpthread
Build System Generator: CMake
The CMake Configuration Used:
cmake_minimum_required(VERSION 3.5)

project(KazaeeTest LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

list(APPEND CMAKE_PREFIX_PATH "~/bin/matlab/R2021a")

find_package(Matlab REQUIRED)
include_directories(${Matlab_INCLUDE_DIRS})
include_directories("${Matlab_ROOT_DIR}/extern/include")
list(APPEND LIBRARIES ${Matlab_ROOT_DIR}/extern/bin/glnxa64/libMatlabEngine.so)
list(APPEND LIBRARIES ${Matlab_ROOT_DIR}/extern/bin/glnxa64/libMatlabDataArray.so)
list(APPEND LIBRARIES ${Matlab_ROOT_DIR}/runtime/glnxa64/libMatlabCppSharedLib.so)
find_package(Threads)
list(APPEND PLATFORM_LIBS ${CMAKE_THREAD_LIBS_INIT})

add_executable(KazaeeTest main.cpp)

target_link_libraries(${PROJECT_NAME} PRIVATE
${LIBRARIES}
${PLATFORM_LIBS}
pthread
)