@Schwarz19972007: What is a direct link to a page on that wiki which shows that "Loading" display?

Sorry, here is the link. Accessing each quiz directly has the same result. "Loading" is displayed as "読み込み中" in Japanese.

https://questio.miraheze.org/wiki/Special:QuizGameHome

When I accessed Questio from the link just above, the quiz was displayed correctly and I could play.

But, when I accessed from a link inside Questio, it still displays "読み込み中（Loading）",

Welcome to Wikimedia Phabricator, I’m going to get one of our collegues to look at this for you as soon as possible to confim where the issue is. I’m stalling this for now because we already have a downstream issue at https://phabricator.miraheze.org/T4947

Hi, see your web browser's developer tools. If there is a problem or an error with JavaScript it should be printed in the 'console' of the developer tools.

In this case, it shows:

ReferenceError: jQuery is not defined 特別:QuizGameHome:240:4
    <anonymous> https://questio.miraheze.org/wiki/特別:QuizGameHome:240
    push https://questio.miraheze.org/w/load.php?lang=ja&modules=startup&only=scripts&raw=1&skin=vector:51
    <anonymous> https://questio.miraheze.org/wiki/特別:QuizGameHome:239

For more information please see:

• https://developer.mozilla.org/en-US/docs/Tools/Web_Console for Firefox
• https://docs.microsoft.com/en-us/microsoft-edge/devtools-guide/console for Microsoft Edge
• https://msdn.microsoft.com/en-us/library/ie/dn255006 for Internet Explorer
• https://developer.chrome.com/devtools for Chrome and Chromium
• https://developer.apple.com/safari/tools/ for Safari

@RhinosF1 @Aklapper Thanks for your activities!