# Invalid JSON RPC response: "" 문의 드립니다

**URL:** <https://devforum.kaia.io/t/invalid-json-rpc-response/2556>\
**Category:** Caver\
**Created:** [11월 26, 2021, 12:26오전 UTC](https://devforum.kaia.io/t/invalid-json-rpc-response/2556 "2021-11-26T00:26:22Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![donnert](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/donnert/32/1213_2.png) [@donnert](https://devforum.kaia.io/u/donnert)\
**Post date:** [11월 26, 2021, 12:26오전 UTC](https://devforum.kaia.io/t/invalid-json-rpc-response/2556/1 "2021-11-26T00:26:22Z")

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간단한 예제인데 안돌아가는 이유가 무엇일까요?  
제목처럼 Invalid JSON RPC response가 나오고 있습니다

const Caver = require(‘caver-js’)  
const caver = new Caver(‘[https://api.baobab.klaytn.net:8651/](https://api.baobab.klaytn.net:8651/)’)

async function testFunction() {  
const version = await caver.rpc.klay.getClientVersion()  
console.log(version)  
}

testFunction()

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<div class="post-metadata">

**Author:** ![Jamie](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/jamie/32/1472_2.png) [@Jamie](https://devforum.kaia.io/u/Jamie)\
**Post date:** [11월 26, 2021, 12:41오전 UTC](https://devforum.kaia.io/t/invalid-json-rpc-response/2556/2 "2021-11-26T00:41:56Z")

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안녕하세요 동일한 예제로 실행했는데, 지금 리턴값을 정상적으로 출력하는데요  
혹시 아직도 저 에러가 발생한다면 사용하시는 Node와 caver-js 버전 정보 부탁드립니다.

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**Author:** ![donnert](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/donnert/32/1213_2.png) [@donnert](https://devforum.kaia.io/u/donnert)\
**Post date:** [11월 26, 2021, 12:54오전 UTC](https://devforum.kaia.io/t/invalid-json-rpc-response/2556/3 "2021-11-26T00:54:01Z")

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버전정보입니다

> npm ls  
> klytn@1.0.0 /Users/test/klytn  
> ├── caver-js@1.6.5  
> └── truffle@4.1.15

> node --version  
> v16.10.0

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<div class="post-metadata">

**Author:** ![donnert](https://yyz1.discourse-cdn.com/flex035/user_avatar/devforum.kaia.io/donnert/32/1213_2.png) [@donnert](https://devforum.kaia.io/u/donnert)\
**Post date:** [11월 26, 2021, 6:05오전 UTC](https://devforum.kaia.io/t/invalid-json-rpc-response/2556/4 "2021-11-26T06:05:36Z")

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노드 버전을 17.0.1로 변경하고 해결되었습니다