I am trying to enter my information for Form 2555, and the Trip Information screen is broken. No. of Days in U.S. on Business must be at least 1. I wasn't in the US!

I live in Sweden, and my trip was to the UK (right before Covid-19 lockdowns started). I wasn't in the U.S. at all during 2020. Why does "No. of Days in U.S. on Business" have to be at least 1? It's nonsense.