"Chemistry: Downvoting" room manually frozen by a mod

Several recent nightly runs failed. The transcript in Sloshy's room seems to indicate that the run finished successfully, but obviously something did not work as expected.

Exception in thread ChatExchange: message_sender for chat.stackexchange.com:
Traceback (most recent call last):
  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/client.py", line 229, in _worker
    self._do_action_despite_throttling(next_action)
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/client.py", line 265, in _do_action_despite_throttling
    response = self._br.send_message(room_id, text)
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/browser.py", line 318, in send_message
    return self.post_fkeyed(
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/browser.py", line 136, in post_fkeyed
    return self.post(url, data, headers)
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/browser.py", line 116, in post
    return self._request('post', url, data, headers, with_chat_root)
  File "/home/runner/.local/lib/python3.10/site-packages/chatexchange/browser.py", line 105, in _request
    response.raise_for_status()
  File "/usr/lib/python3/dist-packages/requests/models.py", line 943, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://chat.stackexchange.com/chats/138453/messages/new

138453 is Chemistry: Downvoting

tripleee / sloshy

"Chemistry: Downvoting" room manually frozen by a mod #59