When we logged into your staging website. We noticed that you have a network installation of plugins. And then we exported the same quiz onto our testing website and the same quiz started performing well.
We request you to please look for which plugin is causing the conflict. To do this, try to disable all the plugins at once. And then enable one by one to find out the conflicting one. Then try to switch to a different theme if plugins were not causing the problem.
Totally understandable frustration—critical errors like this suggest deeper compatibility or maintenance issues. If support is silent, it may be time to switch to actively maintained alternatives or escalate via plugin forums. Official Website
I totally get your frustration with plug-ins that keep failing. Sometimes these errors happen due to conflicts or outdated versions. If you want a reliable alternative, check out this website, it offers a smooth experience for iOS users with seamless navigation and easy setup. It might save you the hassle of dealing with repeated plug-in errors.