Today I've tried to install the Rich Text Editor, but unfortunately I get the same error message as when I try the demo on the WebWiz website -
http://www.richtexteditor.org/demo/
When I had a look at the default.asp and display_form_submission.asp page, I found a typo in display_form_submission.asp file at line 71. It was requesting textarea and not myTextarea as specified in the default.asp file.
I downloaded the current version from the website: web_wiz_rte_v3.1.zip.
Thanks for the nice tool by the way!