Close icon not showing

Hi there, I’m using this plugin for a while now, but now my close button is gone. can you help me?

Image: https://www.dropbox.com/s/rn8k27cn98hc1pj/Scherm%C2%ADafbeelding%202023-03-21%20om%2015.32.13.png?dl=0

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