DevTools failed to load SourceMap: Could not load content for https://ekselen-storage.s3-ap-southeast-1.amazonaws.com/ADMINLTE/css/adminlte.min.css.map: HTTP error: status code 403, net::ERR_HTTP_RESPONSE_CODE_FAILURE code example

Example: DevTools failed to load SourceMap: Could not load content for http://127.0.0.1:8000/bootstrap-select.min.js.map:

You need to go into Dev Tools settings and you need to unckeck 
"Enable JavaScript source maps"
"Enable CSS source maps"