Errors seen in log after upgrade to core-2021.8.6

[HACS-bank]

Describe the bug compatibility with core-2021.8.6 may need work

To Reproduce upgrade to core-2021.8.6

Expected behavior no errors

Log 2021-08-13 18:00:00 ERROR (SyncWorker_7) [custom_components.octopusagile.sensor] Error updating sensor.octopus_agile_previous_rate, check that octopusagile.all_rates populated 2021-08-13 18:00:00 ERROR (MainThread) [homeassistant.helpers.entity] Update for sensor.octopus_agile_next_rate fails Traceback (most recent call last): File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 446, in async_update_ha_state await self.async_device_update() File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 654, in async_device_update raise exc File "/usr/local/lib/python3.9/concurrent/futures/thread.py", line 52, in run result = self.fn(*self.args, *self.kwargs) File "/config/custom_components/octopusagile/sensor.py", line 228, in update next_rate = round(next_rate, 2) TypeError: type NoneType doesn't define round method 2021-08-13 18:00:00 ERROR (MainThread) [homeassistant.helpers.entity] Update for sensor.octopus_agile_current_rate fails Traceback (most recent call last): File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 446, in async_update_ha_state await self.async_device_update() File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 654, in async_device_update raise exc File "/usr/local/lib/python3.9/concurrent/futures/thread.py", line 52, in run result = self.fn(self.args, **self.kwargs) File "/config/custom_components/octopusagile/sensor.py", line 160, in update current_rate = round(current_rate, 2) TypeError: type NoneType doesn't define round method

System (please complete the following information):

System Health

version	core-2021.8.6
installation_type	Home Assistant Container
dev	false
hassio	false
docker	true
user	root
virtualenv	false
python_version	3.9.6
os_name	Linux
os_version	5.10.52-v7+
arch	armv7l
timezone	Europe/London

Home Assistant Community Store

GitHub API | ok -- | -- Github API Calls Remaining | 4993 Installed Version | 1.13.2 Stage | running Available Repositories | 843 Installed Repositories | 4

Home Assistant Cloud

logged_in | false -- | -- can_reach_cert_server | ok can_reach_cloud_auth | ok can_reach_cloud | ok

Lovelace

dashboards | 2 -- | -- resources | 0 views | 1 mode | storage

Additional context

[benjsec]

I have started noticing the same after updating to 2021.9.2 yesterday. I also see this in the logs as well as the previous snippet

Logger: custom_components.octopusagile
Source: custom_components/octopusagile/__init__.py:413
Integration: octopusagile (documentation, issues)
First occurred: 13:30:10 (3 occurrences)
Last logged: 17:30:24
Expecting value: line 1 column 1 (char 0)

and note that the octopusagile.all_rates state doesn't look to have updated properly since I upgraded. I was previously using OctopusAgile v0.1.1 and have since tried updating to v0.1.2-beta.3 which does not seem to have had any noticeable effect on this issue.