Errors, related to version 0.72?

Since the last couple of days I’ve got a lot of erros from my rooted Toon and my Philips Hue Bridge.
Not sure if this is related to the latest updates, but are there any thoughts on this?

I see within the Home Assistant Dashboard quite often my lamps blinking to unavailable.

I get the following errors:

Log Details (ERROR)
Tue Jun 26 2018 07:56:28 GMT+0200 (Central European Summer Time)

Update for sensor.toon_room_temp_setpoint fails
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/homeassistant/helpers/", line 197, in async_update_ha_state
    yield from self.async_device_update()
  File "/usr/lib/python3.6/site-packages/homeassistant/helpers/", line 320, in async_device_update
    yield from self.hass.async_add_job(self.update)
  File "/usr/lib/python3.6/concurrent/futures/", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/config/custom_components/sensor/", line 181, in update
    self._state = float(boilerstatus["roomTempSetpoint"])
TypeError: float() argument must be a string or a number, not 'NoneType'
Unable to reach bridge
7:56 AM components/light/ (ERROR)