Hi @oussama.smaoui , we keep running into some kind of connection related issues (?) that cause our submissions to fail. We tried posting the submission several times, but only the first one was ranked and marked as successful. The third version was ranked, but afterwards we received fail notification email and the submission is now marked as INVALID in the table. All following submissions failed without being ranked. Can you please help us resolve this issue? Is there anything wrong on our side that we should fix? Our submission ids are: 9749689, 9749396, 9749393, 9749390 (scored, but invalid), 9749386, 9749385, 9749347 (scored and accepted) Thanks in advance. FYI @tkubik