New build, MP 2.1.6., Error #009

Hi,

I have a newly configured build with the following:

URL: https://dev.prostyle.si/

WP: 6.4.1

Oxygen Builder: 4.7.1

Motion Page: 2.1.6

PHP: 7.4.3

Motion page is activated but says Error #009, no posts found.

We did try:

Reupload and reinstall plugin, reset the permalinks (configured before and now as: domain/category/postname),

  • resave permalinks (set them also to post name) done

  • check if your homepage is set to a static page (instead of nothing - first blog post) -done

  • JetEngine and Toolset Blocks are currently not-supported - not in use

  • clear and disable all current caching - done

  • check if you are using the latest WP, motion.page & browser version- done

  • verify, that your server is not blocking access to REST API- done

  • verify, that 6G firewall is not blocking some functionality- done

  • RocketLoader from Cloudflare will break frontend scripts - not in use

  • If you use Oxygen Builder, make sure there is a valid main template or set static page as homepage - done

Any ideas on how to solve the described issue and get the error 009 away?