CKEDITOR is not defined

The error message "CKEDITOR is not defined" typically means that the CKEditor JavaScript library has not been loaded properly or its reference has not been included in your HTML document.

To resolve this issue, you can first make sure that you have included the CKEditor script reference in your HTML file. For example:

<script src="https://cdn.ckeditor.com/ckeditor5/29.2.0/classic/ckeditor.js"></script>

If you have already included the reference to the CKEditor script, then double-check that the path is correct and that the script is loading correctly. If the issue persists, try clearing your browser cache and reloading the page.

If you are still having trouble, please provide more information about your implementation and any relevant error messages.