Livechat agent not working with outgoing Webhook

I am using rocketchat 0.64.1 and rasa core for bot.I’m trying to integrate livechat in my website bot as a livechat agent. But as a user when message sent to bot, it replies.But when livechat sent message to bot, it doesn’t reply.

Hi did you ever get this working? I am trying to integrate a RASA bot now and I cannot understand why the webhook if not working.