I added cover art to "1977" in http://musicbrainz.org/edit/18620051

This image used to display without any issue at least until halfway october, but now shows as "not available yet":

http://musicbrainz.org/release/f409e41b-20da-4957-8f66-b65a1b02b13f/cover-art

The response from http://coverartarchive.org/release/f409e41b-20da-4957-8f66-b65a1b02b13f/1666677528.jpg is

<?xml version='1.0' encoding='UTF-8'?>
<Error><Code>NoSuchBucket</Code><Message>The specified bucket does not exist.</Message><Resource>mbid-f409e41b-20da-4957-8f66-b65a1b02b13f not found by Metadata::get_obj()[server]</Resource><RequestId>9d3ca301-22eb-4006-8625-5e9d38f8f0f5</RequestId></Error>

I wonder what happened here.

(I don't know whether this is an issue at archive.org or on our side, filed under CAA for now)