No side arrows, no autoslide…

Hello, please see title. Looking at the dev tool, it reads:

TypeError: $(…).owlCarousel is not a function
at HTMLDocument.eval (eval at <anonymous> (load-scripts.php:2), <anonymous>:4:15)
at i (load-scripts.php:2)
at Object.add [as done] (load-scripts.php:2)
at a.fn.init.n.fn.ready (load-scripts.php:2)
at eval (eval at <anonymous> (load-scripts.php:2), <anonymous>:2:19)
at eval (<anonymous>)
at load-scripts.php:2
at Function.globalEval (load-scripts.php:2)
at Ha (load-scripts.php:3)
at a.fn.init.append (load-scripts.php:3)
buildFromContent @ frontend-editor.min.js:3

any advice?

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