greyed out posts

Hello,

I’ve already tried to reach out for help, and noone has replied so I am trying again as this is important.

I use the free version of postgrid plugin, which meansit didnt follow through onto categories. I copied and pasted the code into the theme editor archive.php to get the grid layout onto the categories. Now when you go to the blog page and go through next pages you will notice there are greyed out pages, when you click on them, they say that the page doesnt exist.

can someone please help me..

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