I'm trying to set up a basic classic TinyMCE editor that comes up in an iframe which is loading a PHP file.
In the PHP I'm using a require_once on wp-load.php to load WordPress, and even with just a basic call to wp_editor with some placeholder text the full functionality of the editor doesn't seem to load.
I can't switch between visual and text, I don't get the row of tinyMCE buttons at the top for formatting, etc.
Is there something else I need to load to get the full functionality of the editor in calling wp_editor?