Loading Audioclip from Resources fails in Build

Hey Guys,

I load Audioclips from the Resources folder into an Audioclip-List. In the editor it works fine, but in the Build not... "object reference not set to an ...". It seems like the Audiofiles are missing...

public List music; AudioClip curClip; float curPlayTime;

public void Start () {

  LoadMusic();
  
  ShowMenu(CurrentMenu);
  
  curClip = music[Random.Range(0, music.Count - 1)];
  audio.PlayOneShot(curClip);
  

}

void Update () {

PlayMusic();

}

void PlayMusic () {

  if(curClip.length < curPlayTime){
      curClip = music[Random.Range(0, music.Count - 1)];
      audio.PlayOneShot(curClip);
      curPlayTime = 0f;
  }
  
  curPlayTime += Time.deltaTime;
  

}

void LoadMusic () {

  DirectoryInfo dir = new DirectoryInfo("Assets/Resources/Music");
  FileInfo[] info = dir.GetFiles();
  foreach (FileInfo f in info){
      if(f.Name.EndsWith("mp3")){
          string path = f.ToString();
              Debug.Log(path);
              path = path.Remove(path.Length - 4, 4);
              path = path.Remove(0, path.Length - 15);
              path = path.Replace("\\", "/");
              Debug.Log(path);
          
          music.Add(Resources.Load<AudioClip>(path));
      }
  }
  

}

Thanks for the help :)