I may assume that your website is protected with SSL (HTTPS), while you are referencing scripts from another sources than your domain, like the CKEditor tool.
What if you download the CKEditor script file to your server and change the script reference to your domain address?
In addition, take a look at this open issue:
CKEditor does not load in Chrome when included in a https site , which if understand currectly, means that you should refer to the CKEditor with HTTPS
instead of HTTP
if you are at a SSL-Protected website.