I have a map on this page https://www.americansouthwest.net/area-map.shtml which has just in the last week or so stopped displaying the overlay elements, because of this error:
Refused to execute script from 'https://www.americansouthwest.net/javascript/data.json' because its MIME type ('application/json') is not executable, and strict MIME type checking is enabled.
The local version of the map still works
What is the easiest way to fix this?