Issues with telegram_bot integration

I am having an issue getting the telegram_bot integration to work. My config looks like this

telegram_bot:
  - platform: polling
    api_key: 1886223941:AAGFV6OZnC-F2VeTqUKz3nA1V3333333333
    allowed_chat_ids:
      - 1177423333

notify:
  - name: ALL_DEVICES
    platform: group
    services:
      - service: mobile_app_mat
      - service: mobile_app_carol

  - name: Telegram_Woudbourne
    platform: telegram
    chat_id: 1177423333

I then try to test the config in developer mode with the following

but I get the following error:

This works:

service: telegram_bot.send_message
data:
  message: 'This is a test'

You have a data block under a data block