Hi. Thanks for that info. Please make sure your event is Published, you set a quantity available, and you set a start date for when tickets should be available for purchase.
If it’s not working for you, please switch to a WordPress default theme like TwentyFourteen, TwentyFifteen, TwentySixteen, etc. and see if there’s a conflict with Avada.
If that doesn’t solve the issue, please provide some screenshots of your event’s wp-admin tickets area and the publicly-available event link.
Thank you.