Hi there!

Thanks for your query.

How did you import within article? Using SP Page Builder editor? Which .json file it is?

Can I have a screencast showing the whole process, kindly?

However, the following docs may help you:

https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/export-import-and-save-how-to-reuse-custom-designs

https://www.joomshaper.com/blog/how-to-reuse-custom-designs-in-sp-page-builder

https://www.joomshaper.com/blog/beautify-your-joomla-blog-posts-with-sp-page-builder

Best Regards