Error #1

{
    "errorId": "238h38sse",
    "error": {
        "userData": {
            "error": {
                "cause": {
                    "code": "ECONNREFUSED",
                    "errno": "ECONNREFUSED",
                    "syscall": "connect",
                    "address": "127.0.0.1",
                    "port": 11999
                },
                "isOperational": true,
                "code": "ECONNREFUSED",
                "errno": "ECONNREFUSED",
                "syscall": "connect",
                "address": "127.0.0.1",
                "port": 11999
            },
            "request": {
                "method": "getblock",
                "parameters": [
                    "423794a517a7a08176b9479f5d0ab34af64e204d4f654d3cebc58d0fbc23aab8"
                ]
            }
        }
    }
}

{
    "error": {
        "cause": {
            "code": "ECONNREFUSED",
            "errno": "ECONNREFUSED",
            "syscall": "connect",
            "address": "127.0.0.1",
            "port": 11999
        },
        "isOperational": true,
        "code": "ECONNREFUSED",
        "errno": "ECONNREFUSED",
        "syscall": "connect",
        "address": "127.0.0.1",
        "port": 11999
    },
    "request": {
        "method": "getblock",
        "parameters": [
            "423794a517a7a08176b9479f5d0ab34af64e204d4f654d3cebc58d0fbc23aab8"
        ]
    }
}

Stacktrace

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