Hi @Yogesh_Simpson, thanks for the post. The trouble with the modal background is that it is currently set to show as a full page, fixed modal triggered by a page load interaction that gets triggered when the Editor is first loaded.
Once that modal window is loaded and the page is fully loaded, the Editor takes over and the interactions on the site are disabled, including the ability to close the modal using the interaction on the Close link.
I am working to help get a resolution for this to see if it is possible to have the page load interaction not trigger if the editor is loaded. I will post an update when I have more info.
While this is open, I would probably recommend to disable the modal window from opening automatically and instead set that up with a CTA button
Thanks in advance.