Hello Josué,
we have encountered the same problem recently and the provided error message was not very helpful to us.
Upon encountering it a second time, we thought it might have to do with quiz size...
And it has. At least in our case, when a quiz has more than a certain amount of questions on one page, certain required parameters get cut off when the results are submitted.
So our solution was: Divide the (single page) quiz into multiple pages. Hope this helps.
Cheers
Thorsten
we have encountered the same problem recently and the provided error message was not very helpful to us.
Upon encountering it a second time, we thought it might have to do with quiz size...
And it has. At least in our case, when a quiz has more than a certain amount of questions on one page, certain required parameters get cut off when the results are submitted.
So our solution was: Divide the (single page) quiz into multiple pages. Hope this helps.
Cheers
Thorsten