Xcode 13 run bugs: 'AttributedString' is ambiguous for type lookup in this context

[zhangfurun]

'AttributedString' is ambiguous for type lookup in this context

[fredericoamsb]

One workaround is to change NSAttributedString to NSMutableAttributedString.

[aornano]

That happened 'cause iOS 15 contains Foundation.AttributedString, to avoid this misunderstanding from the compiler you can make an alias to your code like this:
typealias AttributedString = SwiftRichString.AttributedString

just before your var declarations like this example:

typealias AttributedString = SwiftRichString.AttributedString
var appointmentDate : AttributedString?