Instagram Summit Link

I registered for the Instagram Summit and received a calendar reminder with the link. However, when I click on the link and enter my email address, it says my email is not found. I have tried all 3 of the email accounts I use for personal or business use just to be sure, but none of them are working. I double checked my card statement, and I was definitely charged for the event. That and receiving the calendar invite with the link let me know that I did indeed register. I’m not sure why it’s not letting me in :( Any suggestions??