Page is not visible using upfront editor

Hi,

Some script got bad and then my page is lost and i am not able to reverse the change now.

Whenever i try to edit my page with upfront, the editor comes up and page is lost. Snapshot attached. I know the problem is with google maps plugin, i deleted the plugin also but the problem is still there.

Also, i am already facing this lost page/lost editor problem in my home page, which is still not resolved.

https://wpmudev.com/forums/topic/i-am-not-able-to-see-the-upfront-editor-i-tried

The only option you guys give is reset the theme.

But do we really have any other options to correct a error except making the whole website again just due to one hiccup in the theme.

It seems like i made a few websites in this theme and now i should remake them without using this theme

Thanks

Early responses and feasible resolutions will be appreciated.