Ok. If clearing the cache changes nothing, check your browser's console. There should be some kind of Javascript error that is preventing CKEditor from loading, it should give more info on what's going on.
EDIT
Taking another look at your first screenshot, I see your site is not using HTTPS and that's probably the problem:
Switch your site to use HTTPS, clear again the cache, and try again.
If HTTPS doesn't work, checking your browser console as I mentioned above.