MLModel.compileModel Throws Exception "A valid manifest does not exist"

I am building an image recognition app for iPhone, using Swift, Vision, CoreML and Resnet50. When I run MLUpdateTask, it gives me an error that my model needs to be re-compiled. So I added a bit of code to re-compile the model, but the added code also throws an error about not finding a valid manifest.

Here's a code snippet:

struct ImageCoreML {
  let modelURL = Bundle.main.url(forResource: "Resnet50", withExtension: ".mlmodelc")!
  init() {
    let url = self.modelURL
    Task {
      do {
        let url = try await MLModel.compileModel(at: url)
      } catch {
        print("EXCEPTION: cannot compile model due to error:\n\(error)")
        return
      }
    }
  }
}

And here's the error message:

EXCEPTION: cannot compile model due to error:

Error Domain=com.apple.CoreML Code=3 "Failed to read model package at file:///private/var/containers/Bundle/Application/4C04FEA8-AC82-404B-AB45-5BD326C2F423/FaceID.app/Resnet50.mlmodelc/. Error: A valid manifest does not exist at path: /private/var/containers/Bundle/Application/4C04FEA8-AC82-404B-AB45-5BD326C2F423/FaceID.app/Resnet50.mlmodelc/Manifest.json" UserInfo={NSLocalizedDescription=Failed to read model package at file:///private/var/containers/Bundle/Application/4C04FEA8-AC82-404B-AB45-5BD326C2F423/FaceID.app/Resnet50.mlmodelc/. Error: A valid manifest does not exist at path: /private/var/containers/Bundle/Application/4C04FEA8-AC82-404B-AB45-5BD326C2F423/FaceID.app/Resnet50.mlmodelc/Manifest.json}

Thanks,

Scott