Quiz not loading

I just installed Ari Stream Quiz Pro and built a sample quiz. It is not loading and giving the following error in the console:

Uncaught TypeError: Cannot read property 'replace' of undefined
    at Object._format (eval at <anonymous> (jquery.quiz.js?ver=1.5.36:1), <anonymous>:1:7573)
    at Object._processGlobalVariables (eval at <anonymous> (jquery.quiz.js?ver=1.5.36:1), <anonymous>:1:7382)
    at Object.compileString (eval at <anonymous> (jquery.quiz.js?ver=1.5.36:1), <anonymous>:1:4444)
    at Quiz.buildQuiz (eval at <anonymous> (jquery.quiz.js?ver=1.5.36:1), <anonymous>:1:28241)
    at Object.eval (eval at <anonymous> (jquery.quiz.js?ver=1.5.36:1), <anonymous>:1:27206)
    at i (jquery.js?ver=1.12.4:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4:2)
    at y (jquery.js?ver=1.12.4:4)
    at XMLHttpRequest.c (jquery.js?ver=1.12.4:4)

I’ve tried building a few different quizzes and get the same error.

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