No template named "Linked List" C++

Question

I'm writing a small template class that create and display LinkedList. I also have a class Node that writes in a different file(Node.h). I write the LinkedList class definition in the cpp file, which cause undefine template error in the default constructor.

LinkedList.hpp

#ifndef LinkedList_h
#define LinkedList_h

#include "Node.h"

template<class T>
class LinkedList
{
private:
    Node<T> *headPtr;
    int data;
public:
    LinkedList();
    LinkedList(T A[], int n);
    virtual ~LinkedList();
};


#endif

LinkedList.cpp

#include "LinkedList.hpp"

template<class T>
LinkedList<T>::LinkedList()             //ERROR: No template named "LinkedList"
{
    headPtr = nullptr;
    data = 0;
}

Do I forget to include something?

//UPDATE: I'm adding my Node.h

#ifndef Node_h
#define Node_h

// --------------- class Prototype ----------------- //
template<class T>
class Node
{
private:
    T item;
    Node<T>* next;
public:
    Node();
    Node(const T& item);
    Node(const T& item, Node<T> * next);
    void setItem(const T& item);
    void setNext(Node<T>* nextNodePtr);
    
    T getItem() const;
    Node<T>* getNext() const;
};

//         ------------ Member ------------- //

//Default Constructor
template<class T>
Node<T>:: Node() : next(nullptr) {}
//End default constructor


//COPY CONSTRUCTOR1
template<class T>
Node<T>:: Node(const T& item)
{
    this->item = item;
    next = nullptr;
}
//END COPY CONSTRUCTOR1


//Copy Constructor2
template<class T>
Node<T>:: Node(const T& item, Node<T> *nextNodePtr)
{
    this->item = item;
    next(nextNodePtr);
}
//END COPY CONSTRUCTOR2


//MUTATOR
template<class T>
void Node<T>::setItem(const T& Item)
{
    this->item = item;
}   //END SET ITEM

template<class T>
void Node<T>::setNext(Node<T>* nextNodePtr)
{
    next(nextNodePtr);
}//END SET NEXT

    
//ACCESOR
template<class T>
T Node<T>::getItem() const
{
    return item;
}

template<class T>
Node<T>* Node<T>::getNext() const
{
    return next;
}






#endif /* Node_h */