Unknown signal 11, stderr

using namespace std;
 
template <typename T>
class LinkedList {
public:
  struct Node {
    T value;
    Node* next = nullptr;
 
    Node( T data = T(), Node* node = nullptr)  {
        this->value = data;
        this->next = node;
    };
 
  };
  LinkedList () {
    head = nullptr;
  }
 
  ~LinkedList() {
    while (head ) {
          Node* tmp = head->next;
          delete head;
          head = tmp;
    }
  }
 
  void PushFront(const T& Value) {
    if (head == nullptr) {
        head = new Node(Value);
    } else  {
    Node* NewHead = new Node(Value);
    NewHead -> next = head;
    head = NewHead;
     }
  }
 
  void InsertAfter(Node* node, const T& Value) {
    if (node == nullptr) {
        this->PushFront(Value);
 
    } else {
        Node* New_next = new Node(Value);
        New_next -> next = node -> next;
        node -> next = New_next;
    }
 
  }
 
  void PopFront() {
    if (head == nullptr) {
        return;
    } else {
        Node* tmp = head;
        head = head->next;
        delete tmp;
    }
  }
 
  void RemoveAfter(Node* node) {
    if (node->next == nullptr) {
        return;
    }
    if (node == nullptr) {
        this->PopFront();
    } else {
        Node* tmp = node->next;
        node->next = tmp->next;
        delete tmp;
    }
  }
 
 
  Node* GetHead() { return head; }
  const Node* GetHead() const { return head; }
 
private:
  Node *head = nullptr;
  //size_t size = 0;
};