Your update sucks. The admin panel is all messed up now, with the admin bar showing everything and info hidden behind the dark gray side navigation. PLUS, your stupid update fucked up all my saved grid layouts. All the font sizes and colors I selected w/ your tool are now ignored... so now I have to figure out what's up and fix it before clients get upset. Updated 2 sites that use your tool, and won't be updating any more.
Sorry for the inconvenience. Maybe you're using an older version of WordPress. Our team is currently working on this issue. For a quick fix, please download and install an older version of the post grid by the following URL
Note: to reach the download section, please scroll down to the very end of the page.
Now from your WordPress dashboard, go to Plugin => Add New, upload the download file, and activate it.