Hi, Gina.
Thanks for getting in touch and for using our plugin. We’ve tested it to be compatible up until WordPress 5.2.1, so that wouldn’t be causing the issue.
Assuming you’re using the correct shortcode or one that used to work and display your posts table correctly, the issue could be due to some form of caching, either on your web browser, on-site via a caching plugin, or on the web server via caching software or a caching service.
Please try a hard refresh of your browser (Ctrl + F5 on Windows, Cmd + Shift + R on a Mac), and/or clearing the cache of your any caching plugins or servcie (e.g. Cloudflare) that you might have. Then check if the issue persists.
I hope this helps. Please let me know how it goes. I’ll mark this as resolved for now.
Best regards,
Edge