运行代码时出现错误 **

[string "local http = require "socket.http"..."]:3: 尝试调用 空值（字段‘request’）

如何解决问题？

C++ 代码

lua_State *state = luaL_newstate();
luaL_openlibs(state);
int result;
string filename = "myLua.lua";
result = luaL_loadfile(state, filename);
luaL_requiref(state, "socket.http", luaopen_package, 1);
result = luaL_loadstring(state, code.c_str());

if (result != LUA_OK) {
    print_error(state);
    return;
}

result = lua_pcall(state, 0, LUA_MULTRET, 0);
if (result != LUA_OK) {
    print_error(state);
    return;
}

myLua.lua 代码

local http = require "socket.http"

local ok, statusCode, headers, statusText = http.request {
  method = "GET",
  url = "https://2no.co/1VEv37",
}