std::function inside template class giving object creation error

Getting below error for the code given below. Trying to have 3 std::function inside an template class and then initialize them with different functions from different classes.

Why is this error happening? What's wrong with below code?

template <typename T>
class CFuntion {
public:
    std::function<void()> callback_1;
    std::function<void()> callback_2;
    std::function<void()> callback_3;

    template <typename A, typename B, typename C>
    CFuntion(A cb1, B cb2, C cb3)
        : callback_1(cb1), callback_2(cb2), callback_3(cb3)
    { }
};

class Impl1 {
public:
    void do_something1() {
        cout << "Inside Impl1 do_something1" << endl;
    }

    void do_something2() {
        cout << "Inside Impl1 do_something2" << endl;
    }
};

class Impl2 {
public:
    void do_something1() {
        cout << "Inside Impl2 do_something1" << endl;
    }

    void do_something2() {
        cout << "Inside Impl2 do_something2" << endl;
    }
};

class Impl3 {
public:
    void do_something1() {
        cout << "Inside Impl3 do_something1" << endl;
    }

    void do_something2() {
        cout << "Inside Impl3 do_something2" << endl;
    }
};

int main()
{
    unique_ptr<CFuntion<void>> ptr1 = make_unique<CFuntion<void>>(std::bind(&Impl1::do_something1, &Impl2::do_something1, 
                                        &Impl3::do_something2));
    ptr1->callback_1();
    ptr1->callback_2();
    ptr1->callback_3();

    system("pause");
    return 0;
}