If you're using Widgetkit to display Google maps on your site, it could be that suddenly they don't display anymore but instead show an error:
Oops! Something went wrong.
This is not an error coming from your template/theme, or from Widgetkit or even your CMS. It's coming from Google as provider of the map service.
@michael.maas has just published a new tutorial on this subject with some valuable additional information; so, I've deleted the one here, and you may please follow this link here: