Javascript MIME type mismatch error after server move
The X-Content-Type-Options: nosniff header is a security measure that prevents the browser from attempting to detect the MIME type of a download automatically, as this behavior can be exploited for certain kinds of attacks. The browser will block requests for stylesheets and scripts which are not delivered with a CSS or Javascript MIME type, respectively.

In practice, this means the web server is unable to load the resource for any of several reasons: 


The resource is missing
The file permissions on the resource prevent it from being loaded by the web server
The web server is not configured to deliver .js files using a Javascript MIME type


Please confirm that the file exists, that you have followed all the instructions for moving an existing installation, and that your server is configured correctly, including file permissions and Javascript MIME types. In particular, since this file is loaded in a custom template, you should confirm that the path has not changed.