Post type switcher – content disappears

Hi all. I am very new to all this! I have made some posts which i want to be pages. I have installed the post type switcher and activated it, so i can swap a post to a page. However, when i do that, the “new” page has no content on it, only the title. What am i doing wrong please? I’ve tried switching using quick edit, or normal edit on WP, removing the post from a category, creating a new parent page – but i can only get the content back if i change it back to a post. I’d be grateful for any help! thank you

The page I need help with: [log in to see the link]