template page Archive

Hello,
I contact you because i installed a grid management plugin for my blog. (The Grid – Themeone). it works perfectly with your theme, but I’d like to apply the same to Category pages.
It is apparently possible, as explained in the documentation:
https://theme-one.com/docs/the-grid/#grid_as_template

-> In these files, you will find the main loop:

if (have_posts ()):
     while (have_posts ()): the_post ();
        
     // some code from your theme
     // ...
     // ...
        
     endwhile;
endif;

You just need to replace all the previous php code by this line of code:

The_Grid ('My Grid Name', true); // where true is for template mode

I tried to apply this to the file loop-index.php but without success, your file is much more complicated than this example.

Can you help me please ?

Thank you very much