You can't just display the catalog tree out of the box. If you want to display a catalog content, your content needs a controller with an index action to handle that content type. I suspect you have no RootController and/or CatalogController in your project
Would suggest you take the Episerver Commerce training. Else you're going to struggle if you're trying to implement commerce without it
I will suggest the Episerver Quicksilver sample project https://github.com/episerver/Quicksilver for the implementation of commerce-related functionality.
I'm new to EpiServer and EpiServer Commerce. For my learning purposes, I have created a catalog with products in it in commerce, and I'd like to display the tree or the products on a page in CMS. However, when I drag and drop the Catalog tree or any product from the "Assets Pane/Catalog" on the CMS page's Main Body, I encounter errors like these:
The 'RootContent' cannot be displayed.
The 'CatalogContent' cannot be displayed.
Could you please let me know how I should use/display the catalog items in my website?