But
<script src="file://d/TiddlyWiki/ckeditor/ckeditor/ckeditor.js"></script>
or
<script src="file://d:/TiddlyWiki/ckeditor/ckeditor/ckeditor.js"></script>
aren't working.
Then ckeditor does not load and also no (visible) error message(s).
I downloaded the CKEDITOR Standard Package and followed the instructions from BJ Tools VisualEditor $:/plugins/bj/visualeditor.
To avoid querks with loading the library from the web include the library from your Computer ...
<script type=”text/javascript” src=”./ckeditor/ckeditor.js“></script>
<script src='http://127.0.0.1/libs/ckeditor/ckeditor.js'></script>