What's wrong here?

2018-06-30 00:29:57,399 Loading markets... - thread 2940
2018-06-30 00:29:59,072 Markets loaded: ['Bitcoin Cash/WBTC', 'Bitcoin Cash/WAVES', 'WBTC/WEUR', 'WBTC/WUSD', 'CoffeeCoin/WAVES', 'DASH/WBTC', 'DASH/WAVES', 'EFYT/WBTC', 'EFYT/WAVES', 'WETH/WBTC', 'WETH/WUSD', 'WETH/WAVES', 'WEUR/WUSD', 'Liquid/WAVES', 'Litecoin/WBTC', 'Litecoin/WAVES', 'MonsterByte/WBTC', 'MonsterByte/WAVES', 'Mobile Go Token/WAVES', 'MinersReward/WAVES', 'MyTrackNet/WAVES', '$OCL Oceanlab/WAVES', 'Primalbase Token/WAVES', 'Simdaq Token/WAVES', 'Tidex/WAVES', 'TIMESFARMTOKEN/WUSD', 'TIMESFARMTOKEN/WAVES', 'TurtleNode/WAVES', 'WAVES/WBTC', 'WAVES/WEUR', 'WAVES/WUSD', 'WAVES/WTRY', 'WavesCommunity/WAVES', 'WavesGo/WAVES', 'Monero/WBTC', 'Monero/WAVES', 'Zcash/WBTC', 'Zcash/WETH', 'Zcash/WAVES', 'ZrCoin/WAVES', 'Organic Token/WAVES', 'Frank/WAVES', '/WAVES', 'FORALLcoin/WAVES', 'Eway Token/WAVES', 'Oriental/WAVES', 'Bykor/WAVES', 'Vites/WAVES', 'CPLO/WAVES', 'profitbot/WAVES', 'Huvino Shares/WAVES', 'FORALLcoin/WBTC', 'Mutcoin/WAVES', 'USSR/WAVES', 'BISK/WAVES', 'Evimeria/WAVES', 'Eway Token/WBTC', 'SWAT/WAVES', 'Acepay/WAVES', 'Pharaon/WAVES'] - thread 2940
2018-06-30 00:29:59,072 Loading orderbooks... - thread 2940
odule>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_e
very(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_
main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Traceback (most recent call last):
  File "main.py", line 74, in <module>
    do_every(60, launch_main, dict())
  File "main.py", line 30, in do_every
    f(*args)
  File "main.py", line 34, in launch_main
    result, newBalancePerAsset = main(balancePerAsset)
  File "main.py", line 13, in main
    result = ac.loopOnce(previousBalancePerAsset)
  File "C:\Users\Administrator\Documents\arbit\calculator.py", line 204, in loopOnce
    self.__orderBooks = self.exchange.pullOrderBooks(balance)
  File "C:\Users\Administrator\Documents\arbit\engine.py", line 484, in pullOrderBooks
    if len(orderBook['asks']) == 0 or len(orderBook['bids']) == 0:
KeyError: 'asks'

Could you provide more details?