Same here. Works fine on latest iOS 14, no "Add People" on iOS 15.1. Filed a feedback report back in September.

Same issue here. Filed feedback report back in September. App release also depending on the resolution of this critical issue.

Just faced this issue and deleting all content in the Derived Data folder plus cleaning the build folder fixed it.

Many thanks for your reply, Albert. My question however was not about finding the cause for the this specific crash but instead how to fully symbolicate an ips crash report received from the App Review Team. Quinn's post links to the same Apple page about symbolication that I mentioned in my original post (and that is provided by the App Review Team in their notification about the rejection due to the crash) that seems to be outdated and not fully relevant for crash reportes received from the App Review Team. Thanks.

This post is a duplicate of https://developer.apple.com/forums/thread/772309