I've opened Feedback: FB17628220 for this.
There appears to be something wrong with the later 18.3, .4 SDKs as the profraw file that is pulled from the Simulator is just in the wrong format.
FWIW, also tested in Xcode 16.4 (iOS 18.5) and still no go.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: