Invalid response received: 400; {"jsonrpc":"2.0","error":{"code":-32600,"message":"invalid json request"}}

Questions
1

K1HYG_RSAFHU`GV5)5(O5
K1HYG_RSAFHU`GV5)5(O51848×373 59.1 KB

What am I going to do？

2

Hey, what happens if you try to put the address string directly the the call ?

web3j.ethGetBalance("0x...", DefaultBlockParameterName.LATEST).send();