We should cross check if all data fields in our RPC library are up to date with latest changes in Bitcoin Core. The library is not maintained since quite a while. Some missing data fields which have caused errors when scanning the testnet or mainnet blocks have been added already (segwit).
The https://github.com/priiduneemre/btcd-cli4j library is not maintained anymore (latest commit Mar 20, 2016) and latest Bitcoin Core version was 0.10.3.
We should get it updated to latest Bitcoin Core version.