Remote end closed connection without response

[Rexbalaeniceps]

Please tell why this occur~ Very thanks~

Traceback (most recent call last):
  File "setup.py", line 26, in <module>
    download_extract(
  File "setup.py", line 16, in download_extract
    urllib.request.urlretrieve(url, dl_path)
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 247, in urlretrieve
    with contextlib.closing(urlopen(url, data)) as fp:
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 222, in urlopen
    return opener.open(url, data, timeout)
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 525, in open
    response = self._open(req, data)
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 542, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 502, in _call_chain
    result = func(*args)
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 1397, in https_open
    return self.do_open(http.client.HTTPSConnection, req,
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/urllib/request.py", line 1358, in do_open
    r = h.getresponse()
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/http/client.py", line 1348, in getresponse
    response.begin()
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/http/client.py", line 316, in begin
    version, status, reason = self._read_status()
  File "/home/wbxu/anaconda3/envs/dslp/lib/python3.8/http/client.py", line 285, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response