Content page ALB item doesn't load any page

Hi, in some pages the PAGE CONTENT ALB item loads other pages to be selected, but in another ones doesn’t load any page. And now, if i try to create a new page, and select PAGE CONTENT item doesn’t load any page neither. I’ve tried to delete the item, and load again. I’ve tried to duplicate the page. I’ve tried to create the page again, and nothing. But in some page PAGE CONTENT item loads correctly the other pages.
I’ve tried to deactivate all plugins and nothing. I’ve updated the theme to 4.7.4, WordPress to 5.4.1, and plugins to latest versions.

Can you help me with this issue?

Thanks,

Marc