i have followed all the steps in hello world 1
https://docs.corda.net/hello-world-template.html
https://github.com/corda/cordapp-template-kotlin
but when run this command i have faced this error:
[ERROR] 20:14:21+0200 [Node thread-1] proxies.ExceptionSerialisingRpcOpsProxy.log - Error during RPC invocation [errorCode=ue63ey, moreInformationAt=https://errors.corda.net/OS/4.0/ue63ey] {actor_id=internalShell, actor_owning_identity=O=PartyA, L=London, C=GB, actor_store_id=NODE_CONFIG, fiber-id=10000001, flow-id=ef20094f-ecea-4004-b6dc-e687f88fdce9, invocation_id=c783d17e-1a70-4ec9-93ca-cb08714afac7, invocation_timestamp=2019-03-12T18:14:18.869Z, origin=internalShell, session_id=e7787152-785d-47fc-a5a6-e8893a730942, session_timestamp=2019-03-12T18:14:02.935Z, thread-id=221, tx_id=E38133ECBB005885B0DFD501A214C928AB67C34188C7B0F0BD659825487A27AF}
I can't understand the meaning of the error
how can solve this error ?