Product event not triggering for CSS (onMessageCreate) in 3.0

Hi guys!

Greetings!

I created a 3.0 application that supports Freshdesk and Freshchat


{
  "platform-version": "3.0",
  "modules": {
    "common": {
      "events": {
        "onAppInstall": {
          "handler": "onAppInstall"
        }
      },
      "location": {
        "full_page_app": {
          "url": "index.html",
          "icon": "icon.svg"
        }
      },
      "requests":{
      
      },
      "functions": {
       
        }
      }
    },
    "support_ticket": {},
    "chat_conversation": {
      "events": {
        "onMessageCreate": {
          "handler": "onMessageCreateCallback"
        }
      }
    }
  },
  "engines": {
    "node": "18.16.0",
    "fdk": "9.1.3"
  }
}

When I send a message from Freshchat the event is not triggered.

NOTE: I have installed the application in Freshdesk since the full-page placeholder is not available in Freshchat.