Please check that you have entered your email address correctly. To get your tickets, you have to use the same email address that you used to purchase the tickets. If you need to log in with a different email address, log out of the app and log in again with the correct email address.
Your tickets will be available in the Paleo Tickets app a few minutes/hours after purchase. Refresh the ticket list to see the last update.
If your tickets were sent to you by another Paleo Tickets user, the person may have cancelled the sending. In this case you should check with the person who sent you the tickets.
Make sure that in your confirmation e-mail, it’s mentioned that the tickets are available. In some cases, tickets may not be delivered immediately after purchase!