ccxt: Network Errors. Unable to download even one complete set of historical candles.

No matter how low I set the limit, the connection always drops out. Usually it is able to get about 1 year of data before the errors below occur. Since this is public data, I am not using a key. Does that effect how much data can be downloaded? Thanks for looking.

• OS: Mac
• Programming Language version: Python 3.8
• CCXT version:most recent

def scrape_ohlcv(symbol):

    exchange = ccxt.binance({
    'rateLimit': 200,
    'enableRateLimit': True,
    #'verbose': True,
    })

    start_timestamp = exchange.fetch_ohlcv(symbol, '1m', since=0, limit=1)[0][0]

    now = exchange.milliseconds()

    data = []

    while start_timestamp < end_time:

        try:


            print(exchange.iso8601(exchange.milliseconds()))
            print(f'Fetching {symbol} minutes from:')
            print(exchange.iso8601(start_timestamp))
            ohlcvs = exchange.fetch_ohlcv(symbol, '1m', since=start_timestamp, limit=200 )
            print('Fetched', len(ohlcvs), 'minutes')
            print()
            start_timestamp = ohlcvs[-1][0]
            data += ohlcvs
            time.sleep(1)

        except (ccxt.ExchangeError, ccxt.AuthenticationError, ccxt.ExchangeNotAvailable, ccxt.RequestTimeout) as error:

            print('Got an error', type(error).__name__, error.args, ', retrying in', hold, 'seconds...')
            time.sleep(hold)

    return data```

Traceback (most recent call last)

ConnectionResetError: [Errno 104] Connection reset by peer

urllib3.exceptions.ProtocolError: (‘Connection aborted.’, ConnectionResetError(104, ‘Connection reset by peer’))

requests.exceptions.ConnectionError: (‘Connection aborted.’, ConnectionResetError(104, ‘Connection reset by peer’))

ccxt.base.errors.NetworkError: binance GET https://api.binance.com/api/v3/klines?symbol=BTCUSDT&interval=1m&startTime=1540008480000&limit=200