Wrong visualization

Hi,

i uploaded an event on the link https://www.iia.cnr.it/events/kick-off-meeting-i-seed/ but only on firefox the visualization is correct.

On other browser (chrome, safari) you can see a strange visualization of the event (please see screenshot: https://postimg.cc/9rdqXYyz.

Could you please help me to fix it?

Thanks a lot

Marco

The page I need help with: [log in to see the link]