HTTP 500 error from API on submit from MusicBrainz Picard

[ranclo]

I've tried submitting from Picard a few times today and keep getting a 500 error. Here's what I see in the Picard error log each time:

E: 14:26:10,470 webservice._handle_reply:535: Network request error for https://api.acoustid.org/v2/submit -> Error transferring https://api.acoustid.org/v2/submit - server replied: Internal Server Error (QT code 401, HTTP code 500)
E: 14:26:10,473 acoustid/manager._batch_submit_finished:240: AcoustID submission failed with error 'Error transferring https://api.acoustid.org/v2/submit - server replied: Internal Server Error': internal error
E: 14:26:10,474 acoustid/manager._batch_submit:200: AcoustID submission failed permanently, probably too many retries