Error "cafile, capath and cadata cannot be all omitted" about btfxwss HOT 8 CLOSED

INFO:btfxwss.connection:Connection Error - cafile, capath and cadata cannot be all omitted
INFO:btfxwss.connection:Connection closed
INFO:btfxwss.connection:Attempting to connect again in 10 seconds.

print(wss.queue_processor.tickers)
wss.tickers('BTCUSD')

defaultdict(<class 'queue.Queue'>, {})
Traceback (most recent call last):
  File "/home/kepler/Workspace/FinexMonitor/main.py", line 33, in <module>
    wss.tickers('BTCUSD')
  File "/usr/lib/python3.6/site-packages/btfxwss/client.py", line 48, in tickers
    raise KeyError(pair)
KeyError: 'BTCUSD'

import logging
import sys
import time

from btfxwss import BtfxWss

apikey = '....'
apisecret = '....'

logging.basicConfig(level=logging.DEBUG, filename='test.log')
log = logging.getLogger(__name__)

fh = logging.FileHandler('test.log')
fh.setLevel(logging.DEBUG)
sh = logging.StreamHandler(sys.stdout)
sh.setLevel(logging.DEBUG)

log.addHandler(sh)
log.addHandler(fh)

wss = BtfxWss()
wss.start()
time.sleep(3)  # give the client some prep time to set itself up.

# Subscribe to some channels
wss.subscribe_to_ticker('BTCUSD')

# Do something else
t = time.time()
while time.time() - t < 10:
    pass

ticker_q = wss.tickers('BTCUSD')  # returns a Queue object for the pair.
while not ticker_q.empty():
    print(ticker_q.get())

Traceback (most recent call last):
  File "/home/kepler/Workspace/FinexMonitor/main.py", line 32, in <module>
    wss.subscribe_to_ticker('BTCUSD')
  File "/usr/lib/python3.6/site-packages/btfxwss/client.py", line 132, in subscribe_to_ticker
    self._subscribe('ticker', identifier, symbol=pair, **kwargs)
  File "/usr/lib/python3.6/site-packages/btfxwss/client.py", line 111, in _subscribe
    self.conn.send(**q)
  File "/usr/lib/python3.6/site-packages/btfxwss/connection.py", line 235, in send
    self.conn.send(payload)
  File "/usr/lib/python3.6/site-packages/websocket/_app.py", line 120, in send
    "Connection is already closed.")
websocket._exceptions.WebSocketConnectionClosedException: Connection is already closed.

INFO:btfxwss.connection:Connection Error - [Errno 2] No such file or directory
INFO:btfxwss.connection:Connection closed
INFO:btfxwss.connection:Attempting to connect again in 10 seconds.
DEBUG:btfxwss.client:_subscribe: {'event': 'subscribe', 'channel': 'ticker', 'symbol': 'BTCUSD'}

Traceback (most recent call last):
  File "/home/kepler/Workspace/FinexMonitor/main.py", line 40, in <module>
    ticker_q = wss.tickers('BTCUSD')  # returns a Queue object for the pair.
  File "/usr/lib/python3.6/site-packages/btfxwss/client.py", line 151, in tickers
    raise KeyError(pair)
KeyError: 'BTCUSD'

INFO:btfxwss.connection:Connection Error - [Errno 2] No such file or directory
INFO:btfxwss.connection:Connection closed
INFO:btfxwss.connection:Attempting to connect again in 10 seconds.
ERROR:btfxwss.client:Cannot call subscribe_to_ticker() on unestablished connection!
INFO:btfxwss.connection:Connection Error - cafile, capath and cadata cannot be all omitted
INFO:btfxwss.connection:Connection closed
INFO:btfxwss.connection:Attempting to connect again in 10 seconds.

([[3252.1, 1.78920249, 3255.6, 3.35648544, 425.2, 0.1502, 3255.6, 47986.71579181, 3339.5, 2820.5]], 1501961446.8678486)
([[3255.6, 1.738, 3257.6, 3.33813918, 424.8, 0.1501, 3255.2, 48063.90211299, 3339.5, 2820.5]], 1501961446.9137855)