I was trying to change the barcode on https://bookbrainz.org/edition/a50e5f38-9040-465b-a302-c9055567e22c/edit to the correct one (9783860475348), typoed it the first time. Submitting the new editing makes a POST request to https://bookbrainz.org/edition/a50e5f38-9040-465b-a302-c9055567e22c/edit/handler which returns a 500 status code which is not indicated anywhere in the UI. Instead, the spinner spins forever.