Firebase Storage's getDownloadUrl() method cannot be resolved

To upload images to Firebase Storage, attach to a StorageReference instance . When I override the method, the instance I am calling , but it gives me an erroraddOnSuccessListeneronSuccessgetDownloadUrl()taskSnapshot

Cannot resolve method getDownloadUrl()

I created this app 2 months ago, the app was working fine before and it worked getDownloadUrl()fine. Also, taskSnapshotwhen I press Ctrl+space , for example, I can't find a getDownloadUrl()way in the suggestions. Why is this so?

code to onActivityResult():

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode == RC_SIGN_IN) {
        if (resultCode == RESULT_OK) {
            Toast.makeText(this, "Signed in!!!1", Toast.LENGTH_SHORT).show();
        } else if (resultCode == RESULT_CANCELED) {
            Toast.makeText(this, "Failed to sign in", Toast.LENGTH_SHORT).show();
            finish();
        }
    }
    else if(requestCode == RC_PHOTO_PICKER && resultCode == RESULT_OK){
        Uri selectedPhoto = data.getData();

        StorageReference localRefrence = storageReference.child(selectedPhoto.getLastPathSegment());

        //  Uploading the file on the storage
        localRefrence.putFile(selectedPhoto).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                 Uri downloadUrl = taskSnapshot.getDownloadUrl();

                FriendlyMessage message = new FriendlyMessage(mUsername, null, downloadUrl.toString());
                databaseReference.push().setValue(message);
            }
        });
    }
}