I am trying to get the names and url of the subfolders and files inside a directory in Firebase Storage.
But the listAll is always going to onFailure

FirebaseStorage storage = FirebaseStorage.getInstance();
            StorageReference listRef = storage.getReference();
            listRef = listRef.child("Musics");
            Log.d("hafiz", listRef.getName());

        listRef.listAll()
                .addOnSuccessListener(new OnSuccessListener<ListResult>() {
                    @Override
                    public void onSuccess(ListResult listResult) {
                        for (StorageReference prefix : listResult.getPrefixes()) {
                            // All the prefixes under listRef.
                            // You may call listAll() recursively on them.
                            Log.d("hafiz", prefix.getName());
                        }

                        for (StorageReference item : listResult.getItems()) {
                            // All the items under listRef.
                            Log.d("hafizitem", item.getName());
                        }
                    }
                })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        // Uh-oh, an error occurred!
//
                        Log.d("jibon", e.getMessage());
                    }
                });

I tried the following code:

i am getting this error:

An unknown error occurred, please check the HTTP result code and inner exception for server response.

here is my storage rule:

    service firebase.storage {
      match /b/{bucket}/o {
        match /{allPaths=**} {
         allow read, write;
    }
  }
}