CAA json error with newly added cover art

I have added cover art for a couple releases since the CAA came back on line, but Picard gives an error that the index.json file is not present, which it isn’t. Seems like this has happened in the past, but I don’t know what the solution turned out to be then. See for example, these releases:

Any suggestions?

It appears to be working again, although taking hours or days for Picard to be able to download the artwork.

Please see the following thread