That’s the “I found this on the web” Siri reply for Swift compilation. It happens most frequently, when writing SwiftUI code.

It means absolutely nothing, and infuriates me, whenever I get it.

It’s usually some kind of simple syntax error, but it could be absolutely anywhere in the indicated block of code.

When I get one of those, the way I debug, is to comment out the entire block, then uncomment, in steps, until I encounter the issue.

At that point, I usually just have to spend a bunch of time, staring at the offending section, until I figure it out.