Problem z Szablonem Link2019 C++

#ifndef RESOURCELOADER_H_
#define RESOURCELOADER_H_

#include <map>
#include <SFML\Graphics.hpp>
#include <memory>
#include <iostream>
#include <assert.h>

namespace Textures
{
    enum ID
    {
        Player,
        Sword,
        Desert,
        Toilet,
        Metro,
        Illusive,
        UnderWater
    };
}

template < typename Resource, typename Identifier >
class ResourceHolder
{
public:
    ResourceHolder();
    ~ResourceHolder();
   
    void load( Identifier id, const std::string & filepath );
private:
    std::map < Identifier, std::unique_ptr < Resource >> ResourceMap;
};
#endif // !RESOURCELOADER_H_

template < typename Resoucre, typename Identifier >
ResourceHolder < Resoucre, Identifier >::ResourceHolder()
{
   
}

template < typename Resoucre, typename Identifier >
ResourceHolder < Resoucre, Identifier >::~ResourceHolder()
{
   
}

template < typename Resource, typename Identifier >
void ResourceHolder < Resource, Identifier >::load( Identifier id, const std::string & filepath )
{
    std::unique_ptr < Resource > resource( new Resource() );
    if( !resource->LoadFromFile( filepath ) )
         std::cout << "Loda from file error file: " << filepath << " is broken\n";
   
    auto inserted = ResourceMap.insert( std::make_pair( id, std::move( resource ) ) );
    assert( inserted.second );
}

ResourceHolder < sf::Texture, Textures::ID > rh;
rh.load( Textures::ID::Metro, "Textures\Maps\Metro.png" );