Hi,
I already worked with the free version, so I know how your plugin works. I installed the pro version, but when I make a grid and place the shortcode on a page I get errors. See below:
[Tue May 04 10:03:54.183783 2021] [error] [pid 29966] mod_proxy_fcgi.c(871): [client 213.119.16.183:62340] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined method class_post_grid_functions::layout_content_list() in /data/sites/web/dadachapelcom/www/wp-content/plugins/post-grid/includes/classes/class-functions.php:213\nStack trace:\n#0 /data/sites/web/dadachapelcom/www/wp-content/plugins/post-grid/templates/post-grid-hook.php(509): class_post_grid_functions->layout_content()\n#1 /data/sites/web/dadachapelcom/www/wp-includes/class-wp-hook.php(292): post_grid_item_layout_content()\n#2 /data/sites/web/dadachapelcom/www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()\n#3 /data/sites/web/dadachapelcom/www/wp-includes/plugin.php(484): WP_Hook->do_action()\n#4 /data/sites/web/dadachapelcom/www/wp-content/plugins/post-grid/templates/post-grid-hook.php(424): do_action()\n#5 /data/sites/web/dadachapelcom/www/wp-includes/class-wp-hook.php(292): post_grid_loop()\n#6 /data/sites/web/dadachapelcom/www/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters()\n#7 /data/sites/web/dadachapelcom/www/wp-inc...'

Yes, under Post Taxonomies & terms I checked the taxonomy