Adding wp_editor to custom WP widget
Looks like you need to find another WYSIWYG editor. Reading the Codex, there are two issues with your code:
The
$editor_idcan only be composed of lower-case letters. No underscores, no hyphens. Anything else will cause the WYSIWYG editor to malfunction.
And this one that prevents the editor from working in a meta box
Once instantiated, the WYSIWYG editor cannot be moved around in the DOM. What this means in practical terms, is that you cannot put it in meta-boxes that can be dragged and placed elsewhere on the page.