Content was not found in your page

Hi, I am using astra free + free elementor.

Currently I want to set up my header , but with astra header builder in wp customizer i only can have header on homepage. There is no display option for all website.

So i find this plugin, however, it has the “content was not found in your page” issue when i add new page in templates/headerfooter tab.

Kindly assist how do i solve this?