"Say" is restricted for Addons and will not work outside Dungeons and Raid. But in Raid and Dungeons this option use already the correct channel.

At the moment the Addon got a "restricted command"-Error when I use a Notification in the Overworld.

It would be easy to Change the restricted "say" to the unrestricted "emote".

Components\EventHandlers\Announcements\Announcements.lua
Line 298
change
local channel = "SAY"
to
local channel = "EMOTE"