Tell us what you are trying to do?
If a search was not found can the result just be the overview of the map?
Is there any documentation that you are following?
no
Is there a similar example that we can see?
Search 29412 from the location search on this page ( hidden link ) and you will see the search result text alert come up.
What is the link to your site? hidden link
Thank you for contacting us and I'd be happy to assist.
When no results are found, there are no posts to get the location information from for the map markers. This is why it won't be possible to show an overview of all the locations on the map.