Make sure you select your intent target when you run, and not your app target. This can surface the error in Xcode. (My issue was too much RAM usage.)

Still not sure how to delete the old bundle... This system should be fixed. You should be able to edit bundles without deleting them and creating them again.

Background tasks are also not working for me. I can manually start the Operation and it runs. But the scheduled background task is never ran, and “debug > simulate background task” doesn’t do anything either.