Blank Appdaemon / HADashboard

I’m trying to setup AD for HA so that I can set up a more “wife/guest/child” friendly interface for the wall tablets.

I’m reasonably new to HA, but I think I’ve progressed with HA at a reasonable speed, I’ve got most of my lights integrated now, as well as a number of thermometers around the house.

I digress! - I’m running my setup in dockers within unraid, HA is working fine, (although I’ve swapped to the .81.0 dev version as .79.3 wasn’t allowing ios 9.3 to display the HA UI.
When I open AD I’ve got nothing on the page at all, although the icon does appear as the tab icon.
Any help is gratefully received.

My Configuration is as follows:

appdaemon.yaml:

appdaemon:
  threads: 10
  plugins:
    HASS:
      type: hass
      ha_url: http://192.168.12.201:8123
      ha_key: MYAPIKEY
log:
  logfile: STDOUT
  errorfile: STDERR
  logsize: 100000
  log_generations: 3
hadashboard:
  dash_url: http://192.168.12.201:5050
  dashboard_dir: /dashboards

within dashboards I have the following:

hello.dash
downstairs.dash

hello.dash:

title: Mainpanel
widget_dimensions: [125, 125]
widget_margins: [15, 15]
columns: 6

clock:
  widget_type: clock

weather:
  widget_type: weather
  units: "°C"

reload:
  widget_type: reload

layout:
  - clock(4x2), weather(3x3)
  -
  -
  -
  - reload(1x1)
  
Downstairs:
    widget_type: navigate
    title: downstairs
    dashboard: downstairs

downstairs.dash:

##
##Main Arguments, all optional
##
title: Downstairs
widget_dimensions: [120, 120]
widget_size: [1, 1]
widget_margins: [5, 5]
columns: 6
global_parameters:
    use_comma: 0    
    precision: 1
    use_hass_icon: 1

M20_Cam:
    widget_type: Camera
    title: M20
    entity_picture: https://www.motorwaycameras.co.uk/imagehandlerx/?9277527818240
        
Main:
    widget_type: navigate
    title: Main
    dashboard: hello.yaml

within the apps folder I have the following:

pycache
apps.yaml
hello.py

apps.yaml:

hello_world:
  module: hello
  class: HelloWorld

hello.py:

import appdaemon.plugins.hass.hassapi as hass
#
# Hellow World App
#
# Args:
#

class HelloWorld(hass.Hass):

  def initialize(self):
     self.log("Hello from AppDaemon")
     self.log("You are now ready to run Apps!")