Hi there,
This plugin works with shortcodes. You create a tab sets, add tabs to it with content and then you copy-paste the resulting shortcode in any post/page/custom types to display the tabs.
If you are using a Page Builder/Visual Composer or anything like this I suggest to copy-paste our shortcode in a Text Widget (it does not always has the same name).
If you have a very precise issue with the implementation please let us know here: https://wpdarko.com/support.
Attach a screenshot/URL to your request and we’ll take a look at it very quick.
Thanks!