In mass_mailing: 1. Click CREATE 2. As soon as it appears, click "DISCARD" 3. Wait a little bit -> A traceback appeared. That is because wysiwyg was still busy starting and, in that process, requested the window object of the iframe that was already removed. closes odoo/odoo#84358 X-original-commit: 48ce4f0f834b55692e32868194a635b817c6ed13 Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>