First of all, I’d like to say thank you for such a great theme in Sparkling. I love it!
I installed the plugin mentioned in this post (https://colorlibsupport.com/t/correct-menu-structure/page/2/#post-28178) and my top menu items won’t turn into links. I see it’s pointing to the correct page, but when I click the link, nothing happens. Also, when I click the top link, it turns the dropdown links grey, and if I click again, it turns them back to the darker color. My site is hosted here for now: http://mosaictest.atwebpages.com/
Hopefully this is an easy fix!
Sorry to hear of the problem you are having.
The code shared in the reply https://colorlibsupport.com/t/correct-menu-structure/page/2/#post-28178 is working fine for me using the latest version of Sparkling theme.
I could confirm on your site that it’s not working.
I can see you are using older version 1.9.3 of Sparkling theme so could you please try using latest
Sparkling theme version 2.0?
Also this can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.