Issue with NewsBlur's saved stories feed

IMHO one of the best of NewsBlur’s feature is its capability of RSS output, but recently the feeds content changed and makes trouble with my RSS subscriber.

my saved item feed url as NewsBlur// generates xml as:

<?xml version="1.0" encoding="utf-8"?>
<feed xmlns=""><title>Saved Stories</title><link href="" rel="alternate"></link><link href="<userid>/<folderid>/None" rel="self"></link><id></id><updated>2024-01-02T04:28:13.177000Z</updated>

which add a None at the end of the URL, so its becomes a non-existed one.

is there any way to fix it? thanks.