Hi. They had marked my wife's previous marriage certificate and divorce decree as missing even though I uploaded it. I just simply re-uploaded it and left a note that the PDF contains both the marriage certificate and divorce decree together and apologized for any confusion if they were supposed to be uploaded separately. We got DQ a week later on 12/16/2022.
Just read the note carefully to make sure it is indeed a document you already uploaded. Check the reciprocity page for your country and make sure that you have included what they're asking for. For example, in India there are two types of police certificates, one from the passport office and one from the district police station. Hope this helps!