From the error message “uncaught exception: Cannot tween a null target”, it seems like a JavaScript issue where the script is trying to animate or target an element that isn’t being loaded properly once questions are added. Since it’s happening across different themes, the problem is likely related to the quiz plugin or a JS conflict rather than styling. I’d suggest checking the browser console to identify which script file is triggering the error and ensuring all required elements like the Next and Submit buttons have the correct IDs or classes. Also try temporarily disabling other plugins to rule out conflicts. I faced a similar issue while working on a resource page about It salaries, and it turned out to be a selector mismatch in the template file that prevented the buttons from rendering correctly.
