EXC_BAD_ACCESS, calling getter

I'm not very good with memory management and I'm hoping someone can help explain to me why I am getting the EXC_BAD_ACCESS (code=1...) error. Xcode says that the error occurs when calling the getWord() method.

I am implementing a trie data structure and the error occurs when I try to get a word from my node. I think the problem is with my add function but I cant figure out whats going on. Any suggestions are appreciated.

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <string>
#include <vector>
#include <sstream>


using namespace std;


class Node
{
private:
    string word;
    bool endOfSentence = false;
    int weight = -1;


public:

    vector<Node> children = {};

    Node() {
        this->setWord("");
    }

    Node(string s){
        this->setWord(s);
    }

    string getWord(){
        return this->word;
    }
    /*vector<Node> getChildren() {   //children private
        return this->children;
    }*/
    void setWord(string s) {
        this->word = s;
    }

    void setEOS(){
        this->endOfSentence = true;
    }

    void setWeight(int weight){
        this->weight = weight;
    }
};


class Trie
{
public:
    Node root = *new Node();

    string get(string p) {
        string s = "stub";
        return s;
    }

    void add(vector<string> phrase, int weight){
        Node current = this->root;
        vector<string> sentence = phrase;
        int w = weight;
        int found = -1;

        for (int i = 0; i < current.children.size(); i++) {
            if (phrase[0] == current.children[i].getWord()) {
                found = i;
            }
        }
        if (found >= 0) {
            current = current.children[found];
            sentence.erase(sentence.begin());
            add(sentence,w);
        }
        else {
            addPhrase(sentence,w);
        }
    }

    void addPhrase(vector<string> phrase, int weight) {
        Node current = this->root;
        for (int i = 0; i < phrase.size(); i++) {
            Node temp = *new Node(phrase[i]);
            current.children.push_back(temp);
            current = current.children[current.children.size() - 1];
            if (i == phrase.size() - 1) {
                current.setEOS();
                current.setWeight(weight);
            }
        }
    }
};