Uncaught Exception TypeError: int() can't convert non-string with explicit base

[ebubna]

Running hassio v7.0 / core 2021.12.4 / supervisor 2021.12.2
Trying to get this up and running and receiving the following error:

Logger: root
Source: custom_components/rainforest/sensor.py:147
Integration: rainforest (documentation, issues)
First occurred: 11:52:20 AM (1 occurrences)
Last logged: 11:52:20 AM
Uncaught thread exception

Traceback (most recent call last):
File "/usr/local/lib/python3.9/threading.py", line 973, in _bootstrap_inner
self.run()
File "/usr/local/lib/python3.9/threading.py", line 910, in run
self._target(*self._args, **self._kwargs)
File "/config/custom_components/rainforest/sensor.py", line 147, in serial_read
demand = int(xmlTree.find('Demand').text, 16)
TypeError: int() can't convert non-string with explicit base

[jschulman]

I'm getting this error as well.