Error installing ROS2 Galactic on Windows 10

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I've been trying to install ROS2 Galactic on a computer running Windows 10 for the first time. I'm pretty new to ROS/ROS2, Python, and the command line, so please excuse any dumb mistakes. I followed the installation instructions found on the ROS2 website (https://docs.ros.org/en/galactic/Inst...), but when I got to the portion where you run the demo publisher and subscriber I ran into an issue. The C++ publisher (demo_nodes_cpp talker) runs fine and I get the expected hello world output. However, when I try to run the python subscriber (demo_nodes_py listener) I get the following traceback:

run demo_nodes_py listener
Traceback (most recent call last):
  File "C:\dev\ros2_galactic\lib\demo_nodes_py\listener-script.py", line 33, in <module>
    sys.exit(load_entry_point('demo-nodes-py==0.14.3', 'console_scripts', 'listener')())
  File "C:\dev\ros2_galactic\lib\demo_nodes_py\listener-script.py", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "c:\python38\lib\importlib\metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "c:\python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\dev\ros2_galactic\Lib\site-packages\demo_nodes_py\topics\listener.py", line 16, in <module>
    from rclpy.node import Node
  File "C:\dev\ros2_galactic\Lib\site-packages\rclpy\node.py", line 43, in <module>
    from rclpy.client import Client
  File "C:\dev\ros2_galactic\Lib\site-packages\rclpy\client.py", line 22, in <module>
    from rclpy.impl.implementation_singleton import rclpy_implementation as _rclpy
  File "C:\dev\ros2_galactic\Lib\site-packages\rclpy\impl\implementation_singleton.py", line 32, in <module>
    rclpy_implementation = import_c_library('._rclpy_pybind11', package)
  File "C:\dev\ros2_galactic\Lib\site-packages\rpyutils\import_c_library.py", line 38, in import_c_library
    with add_dll_directories_from_env('PATH'):
  File "c:\python38\lib\contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "C:\dev\ros2_galactic\Lib\site-packages\rpyutils\add_dll_directories.py", line 49, in add_dll_directories_from_env
    dll_dir_handles.append(os.add_dll_directory(prefix_path))
  File "c:\python38\lib\os.py", line 1109, in add_dll_directory
    cookie = nt._add_dll_directory(path)
OSError: [WinError 87] The parameter is incorrect: '.'

When that didn't work I tried the demo_nodes_cpp listener, which worked perfectly. I continued through the tutorials, as I planned to only program in C++, and was able to run turtlesim and turtle_teleop_key without much issue, but when I tried to run rqt I got a very similar looking error:

rqt
Traceback (most recent call last):
  File "C:\dev\ros2_galactic\Scripts\rqt-script.py", line 33, in <module>
    sys.exit(load_entry_point('rqt-gui==1.1.1', 'console_scripts', 'rqt')())
  File "C:\dev\ros2_galactic\Lib\site-packages\rqt_gui\main.py", line 87, in main
    sys.exit(Main().main())
  File "C:\dev\ros2_galactic\Lib\site-packages\rqt_gui\main.py", line 55, in main
    argv = rclpy.utilities.remove_ros_args(args=argv)
  File "C:\dev\ros2_galactic\Lib\site-packages\rclpy\utilities.py", line 44 ...