Family Based Greencard

Having successfully managed my wife's immigration petition back in 2015, I am now attempting to manage her petition for her son. We provided all the asked for documents plus two additional documents that the Ho Chi Minh Consulate asks for. The last ones went in on 29 May 21. On 21 Jun 21 we got a message that read as follows: "NVC cannot review your submitted documents until we have received all of the required documents DS-260, Civil Documents and Financial Documents. Once these documents have been submitted, we will review your case. Please follow your CEAC Home page and https://nvc.state.gov." Both messages were the same.

The problem we have is that we have no idea which documents have not been received. The document submission pages, both Affidavit of Support for us and Civil Documents for him show only that the documents are submitted. I have sent a query in via the Ask NVC Form linked on the page but have had no reply.

I am suspicious that CEAC may have thought some of the uploads of poor quality. I had to compress a few of the files to stay under the 2 MB size limit. Could this be the reason. If so, I wish they had said so and I could look to another method of compression. Has anyone else had this experience.