Fantastical yellow triangle with !?

I’ve been using Fantastical for a few weeks now. I’m noticing an information symbol in Fantastical that does not show up in the Calendar app. Can anyone tell me what this means? I’ve searched the support page but I’m not able to find the answer.

Screen Shot 2021-01-14 at 1.42.08 PM

Update: I figured it out. I finally spotted the small print at the bottom right. I’ll leave this post up in case someone else finds him or herself with the same question.