enum class vector error!! Please help.

#include
#include
I am getting an error in the addEdge function.

no matching function for call to 'HexBoard::addEdge(__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, PlayerColor> > >::value_type&, __gnu_cxx::__alloc_traits<std::allocator<std::pair<int, PlayerColor> > >::value_type&)'

The code is

#include <algorithm>
#include <queue>
#include <cstdlib>
#include <ctime>

using namespace std;

enum class PlayerColor {BLACK, BLUE, RED};

class HexBoard
{
private:
    int SIZE;
    vector< vector<int> > edge;
    typedef pair<int, PlayerColor> ip;
    vector< vector< ip > > vertices;

public:
    HexBoard(int size):SIZE(size)
    {
        vertices=vector< vector< ip > > (size +1,vector< ip >(size + 1));
        auto c=1;
        for(auto i=vertices.begin()+1;i<vertices.end();++i)
            for(auto j=i->begin()+1;j<i->end();++j)
            {
                j->first=c++;
                j->second=PlayerColor::BLACK;
            }
};



void HexBoard::addEdge(int u, int v)
{
    edge[u].push_back(v);
    edge[v].push_back(u);
}

void HexBoard::func()
{
    addEdge(vertices[i][j+1].first,vertices[i][j].first);
}
//