Not displaying. Invisable grid. CSS problem?

Hi there!

Great plugin. My problem is that it seems to be working because it appears for just a second before it disappears completely from the screen while, however, you can still click in the “invisible” grid.
The only thing visible all the time are the categories tags.

I wonder if some settings are interfering with the grid display.

You can check what I mean in
http://www.lidiachia.com/entradas/

Thanks in advance!

https://ww.wp.xz.cn/plugins/wp-ultimate-post-grid/