That's the message I got by clicking the button in top left corner (Firefox):
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Error>
<Code>AccessDenied</Code>
<Message>Access denied.</Message>
<Details>
Anonymous caller does not have storage.objects.list access to the Google Cloud Storage bucket.
</Details>
</Error>
Others didn't seem to have any effect at all. :(