I installed the free plugin and created a post grid, used the shortcode on page and it appeared as I expected.
When I purchased the premium plugin, I removed the free plugin, installed the premium plugin. The original post grid I created under the free plugin shows up in the post grid list. But the page on which it is displayed shows 503 error. I created a second post grid with the premium plugin and when I place this on page I get a 503 error on that page. When I remove the premium plugin and reinstall the free plugin, it works fine.
I then created a new page and posted the shortcode. When I publish and try to view that page I get a 500 error, but only for that page.
So the premium plug does not work on my site, but the free plugin does.
Welcome to our forum.
Can you please exclude current post id where you are displaying post grid, please see the screenshot how to get post id.
http://imgur.com/a/l1iCS
http://imgur.com/a/zXhIk
Let me know the result.
Regards
Thanks for your reply.
We have a related post plugin , you may try https://wordpress.org/plugins/related-post/
Regards