1) General request: Itch gets thousands of successful jam submissions every day. If yours didn't get through, you definitely missed something. I don't mind, just ask for the link.
2) That link doesn't work because it's for their entry. You need to click this for yours https://itch.io/jam/410565/add-game/4044611/4288252?token=R18ieuBdeSAMA9caqaOqEV...