Rich text editor does not work

[Sideshow]

Hello

Trying to put some style in the description of my addon, I get a JavaScript error when clicking "quick preview" as I thought this was the access to the rich text editor. Not sure though.

---Uncaught TypeError: Cannot read property 'value' of null editfile.php?id=281:386

Apparently

---fetch_object('vB_Editor_001_mode')

returns null