See our Search not working helpful hints and Javascript errors. I looked at your site and using browser dev tools and under console saw the below javascript errors on your site. You will need to fix these
Uncaught SyntaxError: Unexpected end of input
jquery-3.4.1.min.js?ver=3.4.1:2 Uncaught TypeError: Cannot read property ‘webkit’ of undefined
at HTMLDocument.<anonymous> (plugins.js?ver=1.0:158)
at e (jquery-3.4.1.min.js?ver=3.4.1:2)
at t (jquery-3.4.1.min.js?ver=3.4.1:2)
jquery-3.4.1.min.js?ver=3.4.1:2 Uncaught Error: Syntax error, unrecognized expression: #header a[href*=#]:not([href=#], a.button[href*=#]:not([href=#])
at Function.se.error (jquery-3.4.1.min.js?ver=3.4.1:2)
at se.tokenize (jquery-3.4.1.min.js?ver=3.4.1:2)
at se.select (jquery-3.4.1.min.js?ver=3.4.1:2)
at Function.se (jquery-3.4.1.min.js?ver=3.4.1:2)
at Function.a.find (jquery-migrate-3.0.0.min.js?ver=3.0.0:2)
at k.fn.init.find (jquery-3.4.1.min.js?ver=3.4.1:2)
at a.fn.init.k.fn.init (jquery-3.4.1.min.js?ver=3.4.1:2)
at new a.fn.init (jquery-migrate-3.0.0.min.js?ver=3.0.0:2)
at k (jquery-3.4.1.min.js?ver=3.4.1:2)
at HTMLDocument.<anonymous> (functions.js?ver=1.0:80)