I commented out the HStack in my code this morning and it started working. I have no idea. Thanks for your reply.

I am seeing the same problem as R4N in his second quote (when using Swift). Specifically, NSItemProvider.loadDataRepresentation(for: UTType, completionHandler: (Data?, (any Error)?) -> Void) -> Progress (when used with UTType .heic) returns the expected result with no error to the completion handler, but issues the message to the console: -[_EXSinkLoadOperator loadItemForTypeIdentifier:completionHandler:expectedValueClass:options:] nil expectedValueClass allowing {( NSNumber, NSMutableDictionary, NSDate, NSString, NSError, NSDictionary, NSData, UIImage, CKShare, NSMutableString, NSMutableArray, NSUUID, NSMutableData, NSValue, NSURL, _EXItemProviderSandboxedResource, NSArray )} I don't know how to look at someone else's feedback (by the number) so don't know if there's been any progress on that.

I've created a demo project. I've saved it as an "xcworkspace" but this system won't let me upload that as a "File", even if I zip it. Tell me how to get it to you.

Official feedback is FB13195763