Throwing NullPointerException and I don't know why. It works just fine in my local environment.

package com.teamtreehouse;

import java.util.Arrays;
import java.util.List;
import java.io.*;

public class Main {

    public static void main(String[] args) {
        BufferedReader mReader = new BufferedReader(new InputStreamReader(System.in));
        Prompter prompter = new Prompter();

        String storyEx = "Thanks __name__ for helping me out.  You are really a __adjective__ __noun__ and I owe you a __noun__.";

        String story = "";
        try {
            do {
                System.out.println("Enter Story");
                System.out.printf("Example: %n%s%n: ", storyEx);
                story = mReader.readLine();
            }while(story == null || story =="");
        } catch (IOException e) {
            e.printStackTrace();
        }

        Template tmpl = new Template(story);
        prompter.run(tmpl);

    }
}

package com.teamtreehouse;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;


public class Prompter {
    private BufferedReader mReader;
    private Set<String> mCensoredWords;

    public Prompter() {
        mReader = new BufferedReader(new InputStreamReader(System.in));
        loadCensoredWords();
    }

    private void loadCensoredWords() {
        mCensoredWords = new HashSet<String>();
        Path file = Paths.get("resources", "censored_words.txt");
        List<String> words = null;
        try {
            words = Files.readAllLines(file);
        } catch (IOException e) {
            System.out.println("Couldn't load censored words");
            e.printStackTrace();
        }
        mCensoredWords.addAll(words);
    }

    public void run(Template tmpl) {
        List<String> results = null;
        try {
            results = promptForWords(tmpl);
        } catch (IOException e) {
            System.out.println("There was a problem prompting for words");
            e.printStackTrace();
            System.exit(0);
        }
        System.out.println(tmpl.render(results));
    }

    /**
     * Prompts user for each of the blanks
     *
     * @param tmpl The compiled template
     * @return
     * @throws IOException
     */
    public List<String> promptForWords(Template tmpl) throws IOException {
        List<String> words = new ArrayList<String>();
        for (String phrase : tmpl.getPlaceHolders()) {
            String word = promptForWord(phrase);
            words.add(word);
        }
        return words;
    }


    /**
     * Prompts the user for the answer to the fill in the blank.  Value is guaranteed to be not in the censored words list.
     *
     * @param phrase The word that the user should be prompted.  eg: adjective, proper noun, name
     * @return What the user responded
     */
    public String promptForWord(String phrase) throws IOException {
        String word = "";
         do{
            System.out.printf("%s: ", phrase);
            word = mReader.readLine();
//            if (mCensoredWords.contains(word.toLowerCase())) {
//                System.out.println("That is rude!");
//            }
        }while (mCensoredWords.contains(word.toLowerCase()) || word == null || word == "");

        return word;
    }
}