facebookfacebook-graph-apifacebook-messengermessengerfacebook-messenger-bot
Persistent menu not showing in Facebook Messenger chat bot
As I don't know why suggested, using Postman.
Per docs, have succesfully POSTed the configuration to facebook APIs:
which is not supposed to be anyways locale specific. Even I don't see here
Localization: Developers can now provide text in multiple languages (or entirely different menus) for each local your bot's users may come from.
Like my brother, I have tried almost everything so far
This looks like some crazy bug. Is there some work around to add a simplest persistent menu?
Solution
Wasted 2 hours on this issue. Until I realised you have to delete the conversation then refresh facebook with ignore cache (ctrl+shift+r in chrome) and then it will show.