[RSS Feed/News] Modernizr is not defined

[XenForo]

I'm trying to add a widget slider from the media gallery, and the slider does not appear and there is this error in the console

Code:

jquery-3.5.1.min.js?_v=21bffa78:2 Uncaught ReferenceError: Modernizr is not defined
    at c.init (slider.min.js?_v=21bffa78:8)
    at b (core-compiled.js?_v=21bffa78:164)
    at c (core-compiled.js?_v=21bffa78:164)
    at HTMLDivElement.<anonymous> (core-compiled.js?_v=21bffa78:165)
    at Function.each (jquery-3.5.1.min.js?_v=21bffa78:2)
    at S.fn.init.each...

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