I get the same error in the same place: .onChange(of: vm.appleTraslationSourceText, { _, newValue in guard configuration == nil else { configuration?.invalidate() return } configuration = TranslationSession.Configuration( source: sourceLanguage, target: targetLanguage) }) .translationTask(configuration) { session in Task { @MainActor in do { let response = try await session.translate(vm.appleTraslationSourceText) // <- fatal error here targetText = response.targetText } catch { // code to handle error } } } This code, like yours, is very similar to Apple's demonstration code for translationTask(_:action:) In my app you tap words to get a translation. If I tap too quickly on different words the crash will occur generating this error: Translation/TranslationError+TranslationOnly.swift:54: Fatal error: Attempted to use TranslationSession after the view it was attached to has disappeared, which is not supported. Instead of storing a TranslationSession instance outside of the .translationTask closure, trigger a .translationTask to run again on a visible view and use that TranslationSession instance. and Refusing new translation request because text session has already been cancelled So my problem seems to occur when requesting a new translation before the previous one has been returned. Your scrollview could be requesting translations very often when scrolling?

I had the same problem. Open the invitation email on a device that DOESN'T have TestFlight installed. Tap on the blue "View in TestFlight" button and you will be taken to a testflight.apple.com page which provides a redeem code. Go to TestFlight on your test device, tap "Redeem" and enter the code.

There is no error. Character range: {47, 4} -> 'cede' " is indeed correct if " character range: {42, 13} -> 'unprecedented' "