How to fix 'TypeError: an integer is required (got type bytes)' error when trying to run pyspark after installing spark 2.4.4

I've installed OpenJDK 13.0.1 and python 3.8 and spark 2.4.4. Instructions to test the install is to run .\bin\pyspark from the root of the spark installation. I'm not sure if I missed a step in the spark installation, like setting some environment variable, but I can't find any further detailed instructions.

I can run the python interpreter on my machine, so I'm confident that it is installed correctly and running "java -version" gives me the expected response, so I don't think the problem is with either of those.

I get a stack trace of errors from cloudpickly.py:

Traceback (most recent call last):
  File "C:\software\spark-2.4.4-bin-hadoop2.7\bin\..\python\pyspark\shell.py", line 31, in <module>
    from pyspark import SparkConf
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\__init__.py", line 51, in <module>
    from pyspark.context import SparkContext
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\context.py", line 31, in <module>
    from pyspark import accumulators
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\accumulators.py", line 97, in <module>
    from pyspark.serializers import read_int, PickleSerializer
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\serializers.py", line 71, in <module>
    from pyspark import cloudpickle
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\cloudpickle.py", line 145, in <module>
    _cell_set_template_code = _make_cell_set_template_code()
  File "C:\software\spark-2.4.4-bin-hadoop2.7\python\pyspark\cloudpickle.py", line 126, in _make_cell_set_template_code
    return types.CodeType(
TypeError: an integer is required (got type bytes)