[Plugin: Page Shortcodes Plugin] no content shows

Hello, I use Elegant Theme template with your plugin. I need to show page content on another page, but [page_content kurz_cabg_2] show nothing. Could you tell me, where is problem.

https://mdct.cz/for-test-purpose-only/

Thank you very much. Thomas.

https://www.ads-software.com/extend/plugins/page-shortcodes/