Erro desconhecido na inicialização

[vitorgamer58]

Algumas vezes o código apresenta este erro no log, logo após o programa finaliza.

[09/10/2019 23:15:21]  https://braziliex.com/api/v1/privatecommand=balance
[09/10/2019 23:15:22]  {"balance":{"nbr":"0.00000001","iop":"0.00000001","eth":"0.00000001","ltc":"0.00000001","btc":"0.00000001","btg":"0.00000002","abc":"0.00000001","bch":"0.00000001","brzx":"0.00000001","brl":"0.02157404"}}
[09/10/2019 23:15:22]  {"code":null,"message":null,"data":[{"available_amount":0,"currency_code":"BRL","locked_amount":0},{"available_amount":0,"currency_code":"BTC","locked_amount":0},{"available_amount":0,"currency_code":"ETH","locked_amount":0},{"available_amount":0,"currency_code":"LTC","locked_amount":0},{"available_amount":0,"currency_code":"BCH","locked_amount":0},{"available_amount":0,"currency_code":"XRP","locked_amount":0}]}
[09/10/2019 23:15:22]  {"code":null,"message":null,"data":[{"available_amount":0,"currency_code":"BRL","locked_amount":0},{"available_amount":0,"currency_code":"BTC","locked_amount":0},{"available_amount":0,"currency_code":"ETH","locked_amount":0},{"available_amount":0,"currency_code":"LTC","locked_amount":0},{"available_amount":0,"currency_code":"BCH","locked_amount":0},{"available_amount":0,"currency_code":"XRP","locked_amount":0}]}
[09/10/2019 23:15:22]  https://braziliex.com/api/v1/privatecommand=balance
[09/10/2019 23:15:23]  ERROR POST O servidor remoto retornou um erro: (429).   em System.Net.HttpWebRequest.GetResponse()
   em ExchangeBraziliex.post(String url, String parameters, String key, String secret) na F:\Downloads\ArbitragemNacional-BCH\ArbitragemNacional-master\exchanges\ExchangeBraziliex.cs:linha 269