After creating a multi-level event, you go to Web > Manage Event Registration Forms and the event is not listed.
Multi-level events cannot be sold online. Please see our Idea in the Community for this to become a future feature of Altru. We encourage you to vote on this post as this is an opportunity to have a voice in the product development process. Our Product Management team uses a variety of methods to determine new features in Altru, and the ideas in the Community is one way they do this, so your vote helps Product Management prioritize the new features that we put into the product.
If you need to sell an event that spans multiple days or occurs in a series and sell online, use the steps in this article to create a pre-registered program.