I can see on your shared site you are using older version of theme so please update the theme to the below latest version as described here https://support.shufflehound.com/updating-theme/
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After updating the theme please clear the cache used on your site.
This can be due to plugin conflict on your site so please try temporary deactivating all plugins except Unyson plugin and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.
Hello Support, …followed all previous instructions: updated the theme, deleted cache and deactivated all plugins.
*Issue is indeed a plugin conflict with “Wow icons” from “Wow Company”
Please let me know how can I proceed to be able to use both theme and plugin simultaneously.