I'm having a similar issue where its crashing from testflight/appstore but works fine on Xcode, but error related FBLPromises framework. Troubleshooting Ive tried mentioned on other forums hasn't worked
ronjohnson101
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
How long did it end up taking and any steps you took? I seem to be in the same position