Disables closing the search field in Wordpress 5.2.2 (kahuna thema installed)

[openemr-roland]

Hi,
I would really like to use this plugin, everything works fine, with one exception: if I click the search icon in Wordpress (Kahuna theme), which opens up a search field, I cannot close the search field anymore (by clicking the X , it does nothing). When I deactivate the plugin all is well, when reactivating the problem is back. The search field icon is in the main menu, so when you cannot close it, it also hides the main menu items, disabling navigation.
Could you look into that? The plugin is really good and does what it promises, but this one thing makes it unusable for my site.