# React Sample App not working due to invalid signature

**URL:** <https://devforum.zoom.us/t/react-sample-app-not-working-due-to-invalid-signature/123531>\
**Category:** Meeting SDK\
**Created:** [December 28, 2024, 5:10pm UTC](https://devforum.zoom.us/t/react-sample-app-not-working-due-to-invalid-signature/123531 "2024-12-28T17:10:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![latenytcoffee](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/latenytcoffee/32/65989_2.png) [@latenytcoffee](https://devforum.zoom.us/u/latenytcoffee)\
**Post date:** [December 28, 2024, 5:10pm UTC](https://devforum.zoom.us/t/react-sample-app-not-working-due-to-invalid-signature/123531/1 "2024-12-28T17:10:37Z")

</div>

Meeting SDK Type and Version  
meetingsdk-3.10.0.tgz

**Description**  
Hi, I have a trouble generating a valid signature to join a meeting room

1. got a client id and a client secret (development app credentials) in marketplace
2. cloned meetingsdk-auth-endpoint-sample repo, set up `.env` accordingly
3. cloned meetingsdk-react-sample, filled out all required fields.
4. ran localhost:4000 which is auth-endpoint-sample
5. ran localhost:5173 and clicked `Join Meeting` button in chrome
6. got an error code 3712

**Error?**

```auto
{
    "method": "join",
    "status": false,
    "result": "Invalid signature.",
    "errorCode": 3712,
    "errorMessage": "Signature is invalid."
}

```

**Troubleshooting Routes**

`eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzZGtLZXkiOiJraXZWb0M3S1M3ZW5LbzZGaXV3T3hnIiwibW4iOiI1NjE5NTk3MTgxIiwicm9sZSI6MCwiaWF0IjoxNzM1NDA0ODk2LCJleHAiOjE3MzU0MTIwOTYsImFwcEtleSI6ImtpdlZvQzdLUzdlbktvNkZpdXdPeGciLCJ0b2tlbkV4cCI6MTczNTQxMjA5Nn0.uKiEyr_tfic-j4I-TYTNSKXwInXGZzabI2-VtkinbAM`

I tried to debug it using jwt io (read Troubleshooting Meeting SDK signature validation) and it is indeed invalid. I don’t know why tho, i have compared with an example token in one of the repo.

```auto
({
  "signature": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzZGtLZXkiOiJhYmMxMjMiLCJtbiI6IjEyMzQ1Njc4OSIsInJvbGUiOjAsImlhdCI6MTY0NjkzNzU1MywiZXhwIjoxNjQ2OTQ0NzUzLCJhcHBLZXkiOiJhYmMxMjMiLCJ0b2tlbkV4cCI6MTY0Njk0NDc1M30.UcWxbWY-y22wFarBBc9i3lGQuZAsuUpl8GRR8wUah2M"
})

```

But doesn’t seem to have a major difference tbh.

Thanks in advance.

Best,  
J

---

<div class="post-metadata">

**Author:** ![adityaXenelsoft](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/adityaxenelsoft/32/50828_2.png) [@adityaXenelsoft](https://devforum.zoom.us/u/adityaXenelsoft)\
**Post date:** [January 9, 2025, 6:01am UTC](https://devforum.zoom.us/t/react-sample-app-not-working-due-to-invalid-signature/123531/3 "2025-01-09T06:01:41Z")

</div>

I am facing same problem. Please, help me if you have resolved this issue.

---

<div class="post-metadata">

**Author:** ![donte.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/donte.zoom/32/24412_2.png) [@donte.zoom](https://devforum.zoom.us/u/donte.zoom)\
**Post date:** [January 9, 2025, 3:10pm UTC](https://devforum.zoom.us/t/react-sample-app-not-working-due-to-invalid-signature/123531/4 "2025-01-09T15:10:35Z")

</div>

@latenytcoffee ,  
Have you had a chance to check out this video on troubleshooting SDK signatures for Meeting SDK:

> [@Failed to join meeting error code 3712](https://devforum.zoom.us/t/failed-to-join-meeting-error-code-3712/124197/3):
>
> @vitieubao83 , Thank you for posting in the Zoom Developer Forum. We actually have Youtube video you can reference for debugging your signature. Here is the link: [[Decoding JWT for Authorization Errors for Zoom Meeting SDK] ](https://www.youtube.com/watch?v=F3l5RJoEKP4) Take a look and let us know if you still are encounter an issue.