I have a similar problem:
OS: Windows 7 SP1
Client: FileMaker Pro Advanced 13.0.3
Server: FIleMaker Server 13.0.2 (though it happens whether or not the file is hosted).
The problem happens on very specific urls. For example:
In fact all the minified versions of jquery from http://code.jquery.com
Also, the exact same content works fine from Google. That is
inserts the exact same content as at the url http://code.jquery.com/jquery.min.js with no error.
Can anyone get http://code.jquery.com/jquery.min.js to work using Insert From URL? Can anyone shed any light why it wouldn't work?
The browser installed is IE 11