If you look in the console there are two errors shown:
Uncaught SyntaxError: Unexpected token '.' in (index):6
There seems to be CSS injected (?) in a <script>
tag.
and
Uncaught ReferenceError: jQuery is not defined
at autoptimize_afe04899ec612bf032dfee6dde977f40.js:2
This could be caused because jQuery is also minified and it's messed up the order of loading. (jQuery not being present in time) There are ways to exclude certain files from minifying.
Does the menu work when you disable Autoptimize and WP-Super-Cache? I wouldn't suggest using two different caching plugins on top of each other as they may cause conflicts.
This is not a direct answer, because the question is vague, but I would suggest looking for errors in the developer tools before trying anything different.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…