Blockchain – Bitcoin Transaction npm shows Bad Request as an answer

I use the npm packet of the bitcoin transaction node to transfer satoshi from one address to another on testnet. I have 0.67779124 satoshi in my testnet address. and I want to transfer it to another address with bitcoin-transaction npm. But it shows me a mistake for Bad Request.

bitcoin-transaction npm uses block explorer for GetBalance, but is not updated quickly in testnet.
and using BlockCypher for push transactions in the chain.

Please help me to solve this problem.