2019-05-19 11:29:01 ERROR (MainThread) [homeassistant.core] Error doing job: Exception in callback <function async_track_state_change.<locals>.state_change_listener at 0x71701db0>
Traceback (most recent call last):
  File "uvloop/cbhandles.pyx", line 68, in uvloop.loop.Handle._run
  File "/usr/local/lib/python3.7/site-packages/homeassistant/helpers/event.py", line 82, in state_change_listener
    event.data.get('new_state'))
  File "/usr/local/lib/python3.7/site-packages/homeassistant/core.py", line 333, in async_run_job
    target(*args)
  File "/usr/local/lib/python3.7/site-packages/homeassistant/helpers/event.py", line 103, in template_condition_listener
    template_result = condition.async_template(hass, template, variables)
  File "/usr/local/lib/python3.7/site-packages/homeassistant/helpers/condition.py", line 331, in async_template
    value = value_template.async_render(variables)
  File "/usr/local/lib/python3.7/site-packages/homeassistant/helpers/template.py", line 140, in async_render
    return self._compiled.render(kwargs).strip()
  File "/usr/local/lib/python3.7/site-packages/jinja2/asyncsupport.py", line 76, in render
    return original_render(self, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python3.7/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python3.7/site-packages/jinja2/_compat.py", line 37, in reraise
    raise value.with_traceback(tb)
  File "<template>", line 1, in top-level template code
TypeError: unsupported operand type(s) for -: 'NoneType' and 'int'