module 'websockets.exceptions' has no attribute 'ConnectionClosedError'

[ampledata]

Task completed: <Task finished coro=<Worker.run() done, defined at /usr/lib/python3/dist-packages/pytak/classes.py:55> exception=ConnectionResetError(104, 'Connection reset by peer')>
ERROR:asyncio:Task exception was never retrieved
future: <Task finished coro=<Worker.run() done, defined at /usr/lib/python3/dist-packages/pytak/classes.py:55> exception=ConnectionResetError(104, 'Connection reset by peer')>
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pytak/classes.py", line 65, in run
    await self.handle_event(event)
  File "/usr/lib/python3/dist-packages/pytak/classes.py", line 100, in handle_event
    await self.writer.drain()
  File "/usr/lib/python3.7/asyncio/streams.py", line 339, in drain
    raise exc
  File "/usr/lib/python3.7/asyncio/selector_events.py", line 801, in _read_ready__data_received
    data = self._sock.recv(self.max_size)
ConnectionResetError: [Errno 104] Connection reset by peer
ERROR:asyncio:unhandled exception during asyncio.run() shutdown
task: <Task finished coro=<StratuxWorker.run() done, defined at /usr/lib/python3/dist-packages/stratuxcot/classes.py:98> exception=AttributeError("module 'websockets.exceptions' has no attribute 'ConnectionClosedError'")>
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/stratuxcot/classes.py", line 125, in run
    async for message in websocket:
  File "/usr/lib/python3/dist-packages/websockets/py36/protocol.py", line 15, in __aiter__
    yield await self.recv()
  File "/usr/lib/python3/dist-packages/websockets/protocol.py", line 419, in recv
    return_when=asyncio.FIRST_COMPLETED,
  File "/usr/lib/python3.7/asyncio/tasks.py", line 363, in wait
    return await _wait(fs, timeout, return_when, loop)
  File "/usr/lib/python3.7/asyncio/tasks.py", line 456, in _wait
    await waiter
concurrent.futures._base.CancelledError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/stratuxcot/classes.py", line 130, in run
    except websockets.exceptions.ConnectionClosedError:
AttributeError: module 'websockets.exceptions' has no attribute 'ConnectionClosedError'

[ampledata]

System has a very old version of python3-websockets:
python3-websockets 7.0-1

ConnectionClosedError wasn't introduced until websockets 8:
https://github.com/aaugustin/websockets/blob/8446d7e02fb1fa3585d93a66d30811cc6bffbf8c/docs/project/changelog.rst#80