error C2275: 'std::vector<_Ty>' : illegal use of this type as an expression

Question

This is my code:

#include "stdafx.h"

#include <codecvt>
#include <cstdio>
#include <locale>
#include <sstream>
#include <string>
#include <vector>
#include <iostream>

using namespace std;

string toMultiByte(const wstring &original)
{
    wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
    return converter.to_bytes(original);
}

int main()
{
    string original = "This:is\nmy:tst?why I hate";
    string separators = ":? \n"

    //vector<wstring> results = splitMany(original, separators);
vector <wstring> wordVector;
stringstream stream(original);
    string line;

    while (getline(stream, line)) 
    {
        std::size_t prev = 0, pos;
        while ((pos = line.find_first_of(separators, prev)) != std::string::npos)
        {
            if (pos > prev)
                wordVector.push_back(line.substr(prev, pos-prev));
            prev = pos + 1;
        }
        if (prev < line.length())
            wordVector.push_back(line.substr(prev, std::string::npos));
    }
}

It gives the error error C2275: 'std::vector<_Ty>' : illegal use of this type as an expression. I googled for it. There were issues like not including namespace & headers. But I have added those things. Still it's not working. I'm pointless of this error. Help me to resolve this.