Custom JS doesn’t work after 4.9.9 update [closed]

you do have your menu JS code currently 2 times on the page.

  1. in https://www.manufakturamocy.pl/mm/wp-content/cache/minify/b6a70.default.include-body.8cc603.js
  2. and in https://www.manufakturamocy.pl/mm/wp-content/themes/mmocy/js/script.js?ver=4.9.9

which causes your menu open and close in the same time.

maybe a problem with your cache and JS minify plugin.