Missing public keys error

[coolmagic]

Hi
I am trying to run example you have mentioned in your documentation. My Transaction is perfect and have keys in it. I am still getting:

Response{protocol=http/1.1, code=500, message=Internal Server Error, url=http://127.0.0.1:8900/v1/wallet/sign_transaction} Exception in thread "main" io.overledger.client.exception.EosApiException: Internal Service Error: Missing public key