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