Hello Community,

I recently upgraded to Odoo 19 and I’m facing a frontend error when trying to access the Discuss app. The system is looking for mail.action_discuss but it seems this action is missing in the registry.

Here’s the exact error log:

UncaughtPromiseError > KeyNotFoundError

Uncaught Promise > Cannot find key "mail.action_discuss" in the "actions" registry

Occurred on my Odoo instance on 2025-10-04 18:26:29 GMT

KeyNotFoundError: Cannot find key "mail.action_discuss" in the "actions" registry
    Error: Cannot find key "mail.action_discuss" in the "actions" registry
        at Registry.get (https://mydomain.com/web/assets/debug/web.assets_web.js:38820:19)
        at _executeClientAction (https://mydomain.com/web/assets/debug/web.assets_web.js:107486:45)
        at Object.doAction (https://mydomain.com/web/assets/debug/web.assets_web.js:107659:24)
        at async Object.selectMenu (https://mydomain.com/web/assets/debug/web.assets_web.js:109593:17)
        at async WebClient.loadRouterState (https://mydomain.com/web/assets/debug/web.assets_web.js:112607:13)

Steps I already tried:

• Checked menu items in Settings → Technical → User Interface → Menu Items but couldn’t find any action for mail.action_discuss.
• Searched for actions under Settings → Technical → Actions → Window Actions but couldn’t locate it either.
• Cleared cache and restarted the server, no luck.

Question:

• Was mail.action_discuss renamed or removed in Odoo 19?
• If so, what is the recommended way to fix this (update menus, or patch with a new XML record)?

Thanks in advance for any guidance!