I've recently encountered an error in GeneratePress Elements. I disabled all plugins and activated one by one. Post Grid seems to be causing the issue.
Here's the ticket over at the GeneratePress support forum: https://generatepress.com/forums/topic/elements-hook-showing-no-results-found/#post-933485
Welcome to our forum.
Please send me temporary admin access to your site, i will check the issue. also if possible, please send me the screenshot of browser console area. i don’t see any error come from post grid on GeneratePress forum you shared.
I will be waiting for you.