Thank you so letting me know. Yes, I put IMM0008 as well. But I also tried use the passport info many times, it still doesn’t work. For the family members, it’s me (sponsor) husband( co-signer) 2 kids and my parents. What number I should enter? I tried 2,4,6, none of them working. I tried 15 times now.I was in the same situation and it turned out that I was entering the primary applicant city of birth same as I put it on the IMM0008 while I had to enter it the same as her passport. There was a slight difference.