error articles section

[giangivi]

Good morning, I'm trying to create a site for my business, and to understand how to do it, I downloaded a free quickstart version to understand how work the various menus, articles, etc...
The problem is that as soon as I enter the "articles" section to see how they are set up, the message "An error has occurred. 0 Call to a member function removeField() on null" appears.
How can I see how the articles are structured?

[Per Yngve Berg]

Download and install the official Joomla.

[AMurray]

The error demonstrates one of the reasons why we frequently advise "Don't use quick-start packages for production sites" on this forum. They should only be used for demonstration purposes.

The template provider should have a stand-alone version of the template. Install the normal Joomla package (https://downloads.joomla.org for Joomla 5.1 or https://downloads.joomla.org/cms/joomla4 for J4) and install the stand-alone template and any related extensions as you see in the quickstart.

Note, that you may have to pay subscription fees for some of those extensions e.g. pro versions) to build your site the way the demo shows it. But it is best to build it from the ground up, once you understand how it's done in the demo.

Have you tried editing the articles from the front end? What template package are you using?

To trace the errors further, please turn on debug and PHP error reporting (global configuration), and post any additional errors you see.

[giangivi]

Thanks for the replies.
I installed the quickstart package just to study how it works, then I would make the site starting from a new installation.
Unfortunately I can't analyze it well because the articles section is blocked

[ceford]

Installed where? And why Joomla 4? If you want to know how it all works install a local development environment on your laptop/desktop and start with Joomla 5. And read the documentation!