I know that this thread is 4 years old, but it might help identify the bug @Thunkable_Staff
It says:
The
__CRASHING_DUE_TO_PRIVACY_VIOLATION__crash happens whenever there is a mandatory permission string missing on the app’s plist. Permissions level are changed by Apple with new iOS versions sometimes. So code that was working will start breaking with iOS updates that have new requirements for the plists.
It might has something to do with Touch ID/Face ID, as in the new iOS there are updates to that as well:
