Error #1

{
    "errorId": "389wer07eghdd",
    "error": {
        "userData": {
            "error": {
                "cause": {
                    "errno": "ECONNREFUSED",
                    "code": "ECONNREFUSED",
                    "syscall": "connect",
                    "address": "127.0.0.1",
                    "port": 8396
                },
                "isOperational": true,
                "errno": "ECONNREFUSED",
                "code": "ECONNREFUSED",
                "syscall": "connect",
                "address": "127.0.0.1",
                "port": 8396
            },
            "request": {
                "method": "getblockhash",
                "parameters": [
                    5203121
                ]
            }
        }
    }
}

{
    "error": {
        "cause": {
            "errno": "ECONNREFUSED",
            "code": "ECONNREFUSED",
            "syscall": "connect",
            "address": "127.0.0.1",
            "port": 8396
        },
        "isOperational": true,
        "errno": "ECONNREFUSED",
        "code": "ECONNREFUSED",
        "syscall": "connect",
        "address": "127.0.0.1",
        "port": 8396
    },
    "request": {
        "method": "getblockhash",
        "parameters": [
            5203121
        ]
    }
}

Stacktrace

Error: RpcError: type=failure-02
    at Client.<anonymous> (/home/explorer/btc-rpc-explorer/app/api/rpcApi.js:434:13)
    at Client.tryCatcher (/home/explorer/btc-rpc-explorer/node_modules/bluebird/js/release/util.js:16:23)
    at Promise.errorAdapter (/home/explorer/btc-rpc-explorer/node_modules/bluebird/js/release/nodeify.js:35:34)
    at Promise._settlePromise (/home/explorer/btc-rpc-explorer/node_modules/bluebird/js/release/promise.js:601:21)
    at Promise._settlePromise0 (/home/explorer/btc-rpc-explorer/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/explorer/btc-rpc-explorer/node_modules/bluebird/js/release/promise.js:725:18)