stem says "dictionary keys changed during iteration" with python 3.8

Every single time I try to connect to for from Nyx I get Traceback (most recent call last): File "/usr/lib/python3.8/site-packages/stem/connection.py", line 370, in _connect_auth authenticate(control_socket, password, chroot_path) File "/usr/lib/python3.8/site-packages/stem/connection.py", line 625, in authenticate raise auth_exc stem.connection.MissingPassword: no passphrase provided During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/bin/nyx", line 11, in <module> load_entry_point('nyx==2.1.0', 'console_scripts', 'nyx')() File "/usr/lib/python3.8/site-packages/nyx/__init__.py", line 176, in main nyx.starter.main() File "/usr/lib/python3.8/site-packages/stem/util/conf.py", line 289, in wrapped return func(*args, config = config, **kwargs) File "/usr/lib/python3.8/site-packages/nyx/starter.py", line 90, in main controller = init_controller( File "/usr/lib/python3.8/site-packages/nyx/__init__.py", line 325, in init_controller TOR_CONTROLLER = stem.connection.connect(*args, **kwargs) File "/usr/lib/python3.8/site-packages/stem/connection.py", line 291, in connect return _connect_auth(control_connection, password, password_prompt, chroot_path, controller) File "/usr/lib/python3.8/site-packages/stem/connection.py", line 404, in _connect_auth return _connect_auth(control_socket, password, password_prompt, chroot_path, controller) File "/usr/lib/python3.8/site-packages/stem/connection.py", line 375, in _connect_auth return controller(control_socket, is_authenticated = True) File "/usr/lib/python3.8/site-packages/stem/control.py", line 1057, in __init__ super(Controller, self).__init__(control_socket, is_authenticated) File "/usr/lib/python3.8/site-packages/stem/control.py", line 585, in __init__ self._post_authentication() File "/usr/lib/python3.8/site-packages/stem/control.py", line 3902, in _post_authentication owning_pid = self.get_conf('__OwningControllerProcess', None) File "/usr/lib/python3.8/site-packages/stem/control.py", line 2170, in get_conf entries = self.get_conf_map(param, default, multiple) File "/usr/lib/python3.8/site-packages/stem/control.py", line 2273, in get_conf_map for key in reply: RuntimeError: dictionary keys changed during iteration

Using Arch Linux on a headless server, python 3.8.0b4. Tried both cookie and password authentication methods. Controlport is 9051, inaccessible from outside (firewall set up to allow any internal connections to any port)