Menu hamburger not working on mobile

Hello,

My website uses the Kale theme and the navigation menu is only available on the top. On mobile, the hamburger was not opening upon clicking (it used to work previously but 3 weeks back stopped working). I searched up various articles, found the following code and added it to my Additional CSS:

@media(max-width:767px){ .collapse{ display:block!important; } button.navbar-toggle{ display:none!important; } }

However, now the hamburger does not collapse. Can you please help.

Thanks,

Glutensure

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