I am receiving the error message "Invalid response value detected" when trying to access quizzes (via a hyperlinked label) using the iOS mobile app but not from Android devices. But I can access the quiz when I go direct to the quiz (without the label hyperlink).
In a nutshell I have built a course using only labels which then link to videos, quizzes, documents etc that sit in the last topic in the course. Once it is finished I shall orphan this topic so it is effectively hidden from view. Everything works fine on desktops and android devices via the Moodle app. The issues are with the iOS app as I have detailed above.
I'd be grateful for any help with this. Everything seems to point an issue with the iOS app but you may think otherwise.