This message shows to a lot of students, but not all, when trying to submit. The questionnaire was created long before the upgrade.
We recently upgraded from 3.11.6 to moodle 4.1.6, Questionnaire 4.0.1 (Build - 2023051600)
I found this in the tracker, and it seems that the problem has been around for a while but this is the first time we had it. https://tracker.moodle.org/browse/CONTRIB-9206
There is a fix mentioned in the tracker discussion, does it solve the problem and if it does, is there a reason it hasn't been implemented?
Any suggestions about what we should do? Our server tech is, wisely, not keen on hacking the core code.