@svit or @liquidfractal, I tested 1.2.8 on a IPS 4.3.0 board then I upgrade to Quizzes 1.3.0 and I got no error on my server; not sure this is due to how it is set and I can't change it (Hostgator):
Obvisously there's a issue, since you both can reproduce it.
Checked a plenty of things and only noticed one tiny thing in a new FURL, which could case a server error... but I'm not sure it is the issue, so I would like to request ACP access from any of you so I can go testing it out.
Tks.