Null Object Ref in Custom Freeplay [Psych 1.0]

[Epic-Mawer]

Describe your problem here.

Sometimes, after pressing a playable song, a Null Object Reference appears. I don't know if it has to do with the song itself, or if there's something missing in the state. If anyone knows how to fix this, lemme know.

Here's the State: (Names of songs are changed to avoid leaks and stuff)

package states;

import flixel.FlxState;
import flixel.FlxG;
import flixel.ui.FlxButton;
import flixel.input.mouse.FlxMouseEvent;
import backend.Song;
import states.PlayState;
import backend.MusicBeatState;
import states.LoadingState;
import sys.FileSystem;

class CustomFreeplayState extends MusicBeatState {

public function new() {
    super();
}

override public function create():Void {
    super.create();

    FlxG.mouse.visible = true;
    
    // Add buttons or UI elements for selecting songs
    
    // Create a "Back" button to return to the main menu
    var backButton:FlxButton = new FlxButton(50, 50, "Back", onBackPressed);
    add(backButton);
    
    // Load Story Songs (Top)
    var 1Button:FlxButton = new FlxButton(50, 150, "SONG1", onSONG1Pressed);
    var 2Button:FlxButton = new FlxButton(50, 200, "SONG2", onSONG2Pressed);
    var 3Button:FlxButton = new FlxButton(50, 250, "SONG3", onSONG3Pressed);
    
    // Load Epilogue Songs (Bottom)
    var 4Button:FlxButton = new FlxButton(50, 350, "SONG4", onSONG4Pressed);
    var 5Button:FlxButton = new FlxButton(50, 400, "SONG5", onSONG5Pressed);
    
    add(1Button);
    add(2Button);
    add(3Button);
    add(4Button);
    add(5Button);
}

// Button Press Handlers for Story Songs
private function onSONG1Pressed():Void {
    if (songExists('song1')) {
        FlxG.mouse.visible = false;  // Hide the mouse
        PlayState.SONG = Song.loadFromJson('song1-hard', 'song1');
        LoadingState.loadAndSwitchState(new PlayState());
    } else {
        showSongNotFoundMessage('SONG1', 'assets/songs/SONG1/song1.json');
    }
}

private function onSONG2Pressed():Void {
    if (songExists('song2')) {
        FlxG.mouse.visible = false;  // Hide the mouse
        PlayState.SONG = Song.loadFromJson('song2-hard', 'song2');
        LoadingState.loadAndSwitchState(new PlayState());
    } else {
        showSongNotFoundMessage('SONG2', 'assets/songs/SONG2/song2.json');
    }
}

private function onSONG3Pressed():Void {
    if (songExists('song3')) {
        FlxG.mouse.visible = false;  // Hide the mouse
        PlayState.SONG = Song.loadFromJson('song3-hard', 'song3');
        LoadingState.loadAndSwitchState(new PlayState());
    } else {
        showSongNotFoundMessage('SONG3', 'assets/songs/SONG3/song3.json');
    }
}

// Button Press Handlers for Epilogue Songs
private function onSONG4Pressed():Void {
    if (songExists('song4')) {
        FlxG.mouse.visible = false;  // Hide the mouse
        PlayState.SONG = Song.loadFromJson('song4-hard', 'song4');
        LoadingState.loadAndSwitchState(new PlayState());
    } else {
        showSongNotFoundMessage('SONG4', 'assets/songs/SONG4/song4.json');
    }
}

private function onSONG5Pressed():Void {
    if (songExists('song5')) {
        FlxG.mouse.visible = false;  // Hide the mouse
        PlayState.SONG = Song.loadFromJson('song5-hard', 'song5');
        LoadingState.loadAndSwitchState(new PlayState());
    } else {
        showSongNotFoundMessage('SONG5', 'assets/songs/SONG5/song5.json');
    }
}

// Back Button Handler
private function onBackPressed():Void {
    FlxG.switchState(new MainMenuState());
}

// Check if the song folder and json file exist
private function songExists(songName:String):Bool {
    var capitalizedSongName:String = songName.substr(0, 1).toUpperCase() + songName.substr(1);
    var songFolder:String = 'assets/shared/data/' + capitalizedSongName; // Capitalize the first letter of songName
    var songJsonFile:String = songFolder + '/' + songName.toLowerCase() + '.json'; // Make sure the JSON filename is lowercase
    return FileSystem.exists(songJsonFile);
}

// Show a message if a song is missing
private function showSongNotFoundMessage(songName:String, songJsonFile:String):Void {
    trace("Song '" + songName + "' not found. Please implement this song.");
    trace("Path: '" + songJsonFile + "'. Check if correct!");
}

}

Are you modding a build from source or with Lua?

Source

What is your build target?

Windows x64

Did you edit anything in this build? If so, mention or summarize your changes.

I've created a new state to replace Freeplay, but the OG state is still there.