Error #1

{
    "errorId": "389wer07eghdd",
    "error": {
        "code": 500,
        "userData": {
            "request": {
                "method": "getblockhash",
                "parameters": [
                    null
                ]
            }
        }
    },
    "userData": {
        "errorMsg": "{\"result\":null,\"error\":{\"code\":-3,\"message\":\"Wrong type passed:\\n{\\n    \\\"Position 1 (height)\\\": \\\"JSON value of type null is not of expected type number\\\"\\n}\"},\"id\":\"75c303f1-bf43-4a6e-8235-0dd323747290\"}\n"
    }
}

{
    "request": {
        "method": "getblockhash",
        "parameters": [
            null
        ]
    }
}

Stacktrace

Error: {"result":null,"error":{"code":-3,"message":"Wrong type passed:\n{\n    \"Position 1 (height)\": \"JSON value of type null is not of expected type number\"\n}"},"id":"75c303f1-bf43-4a6e-8235-0dd323747290"}

    at IncomingMessage.<anonymous> (/btc-rpc-explorer/node_modules/jayson/lib/client/http.js:78:23)
    at IncomingMessage.emit (node:events:529:35)
    at endReadableNT (node:internal/streams/readable:1400:12)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)