well, I have not heard of ckebell yet.
Do you, Ionut, have the same problem? If so, please provide details (description and screenshots - if the might help), I will try to help.
Make sure you
- using the latest version of my AG
- using the latest version of my extension
- did all changes as documented
- uploaded all files correctly
- no other errors are shown in the browser console
- no other errors are thrown by php
- please also make sure, it's not working on your target site (the problem(s) might occur on localhost only)