When accessing your tickets, you will need to sign in with the account you used when you ordered your ticket.
If you are signed in but your ticket is not shown, it is likely that you are signed into the wrong account (i.e., the account you are currently signed into is not the one you used to order your ticket).
Please sign out and sign in with the account you used when you ordered your ticket.
For details, please check How to sign out of your account.
If you experience trouble signing into your account, please check Troubleshooting login issues.