Taxonomy Question

I’ve installed a calendar plugin on my site, and am having an odd issue. The users are able to add their own events, but on that form there’s a form item called Select Prominent word. Which doesn’t come from the calendar plugin according to that plugin company.

I’m thinking it’s possibly coming from the theme, and that whole taxonomy setup in the admin. I don’t really understand it, but wondering if it is possibly coming from there? HEre’s a screen shot of the field https://www.westislandblog.com/wp-content/uploads/2019/08/taxonomy.jpg

if you login wiht that subscriber user, you’ll see the form.

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