Update killed my Automations - Sept 2019

Hi everyone, thanks in advance, I’ve spent quite a bit of time scouring the internet, but cannot find my issue. I’ve just performed a few upgrades both on the host system: Ubuntu 16.04.6 LTS and Hass.io to Version 188 and Home Assistant to 0.99.2 and now my automations for my RF light switches (via an RFBridge) are no longer working. An example of one is below:

  - alias: RFButt1
    hide_entity: False
    trigger:
      platform: mqtt
      topic: 'tele/RF1/RESULT'
    condition:
      condition: template
      value_template: '{{ trigger.payload_json.RfReceived.Data == "C585E2" }}' 
    action:
      service: switch.toggle
      entity_id: group.kichen_room_lights

Configurator reports no issues with formatting and it was good previously prior to upgrading, so I’m guessing it must be a syntax change, but I cannot see it. Any help would be greatly appreciated.

Try replacing

service: switch.toggle

with

service: homeassistant.toggle

Another option if you have a lot of RF Devices is to look into using Strategy 2: Demultiplexer
It will make for a cleaner solution and it allows you to retain the states of the switches after a restart.