The plugin doesn’t work in Safari. I’m normally using Chrome and had no issues, but just tested the website in Safari and the search box don’t respond.
I’ve just tried on multiple Mac devices, but it’s working for me.
Are you using Safari on a Mac computer or Safari for Windows?
Just asking because safari for Windows was discontinued 5 years ago, and it’s no longer viable for testing anything, or using at all.
If not, then make sure to clear the browser cache, CDN cache and the site cache as well.