DevTools failed to load SourceMap: Could not load content for http://127.0.0.1:8000/js/mixins.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE code example
Example: DevTools failed to load SourceMap: Could not load content for
Open Developer Tools,
go to "Settings" for Developer Tools,
then uncheck Enable JavaScript Sourcemaps under the "Sources" settings.
Restart Browser if needed