Someone else must have received this message while (or after) converting an iOS project to Swift 3, yet when I do a Google search, I get no relevant results.
Anyway, after converting to Swift 3, I have about 30 warnings that say:
Expression implicitly coerced from 'UIView?' to Any
In my case it was an issue related to a dictionary without explicit type:
let dict = ["key": value]
Than I solved specifying the type:
let dict: [String: Any] = ["key": value]