JS Error Freezes

Hi,

I’m using RevieZine Theme, and I’m trying to use LearnPress, but I’m getting the following error that frezzes lessons and quizzes:

script.all.js?ver=1.0.1:35 Uncaught TypeError: stickyNav is not a function
    at HTMLDocument.<anonymous> (script.all.js?ver=1.0.1:35)
    at i (jquery.js?ver=1.12.4:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4:2)
    at Function.ready (jquery.js?ver=1.12.4:2)
    at HTMLDocument.K (jquery.js?ver=1.12.4:2)

Any clue?

Ty in advance