Are you able to use a different browser - firefox or chrome? I don’t use Windows so am not able to confirm whether there is a problem using IE11.
But it appears that the debugging window that you are using does not provide a view of the http requests, or at least you cannot find it.
I just fired-up a Windows 7 laptop that has IE 10. This is what the Developer Tools looks like. Hopefully it is similar in IE 11.
CKEditor is defined in the file ckeditor.js that should be requested when you go to the phplist campaign page. As both fckeditor and ckeditor both don’t work for you then I guess that there is a problem in loading that file, and a similar one for fckeditor, rather than a direct problem with either plugin.