i add a simple button in a static block. If i use the button-opitons to define a URL, the displayed lightbox with the settings cant closed or aborted. If i set a correct link the lightbox close and after the reload i am in the blog settings.
Thats very confusing.
With WP version 4.8 everything was fine and worked correctly with the Button URL settings.
I hope you can help with this issues.
Important: Work on a local test server, website is not yet public!
If you working on localhost could you provide us with screenshots step by step for better understanding or maybe video? Also, make sure that you use the latest version of VC plugin https://www.8theme.com/download-plugins/