# Joining meeting timeout ... Signature is invalid

**URL:** <https://devforum.zoom.us/t/joining-meeting-timeout-signature-is-invalid/80299>\
**Category:** Meetings\
**Created:** [December 14, 2022, 1:53pm UTC](https://devforum.zoom.us/t/joining-meeting-timeout-signature-is-invalid/80299 "2022-12-14T13:53:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![juangilbert](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/juangilbert/32/43804_2.png) [@juangilbert](https://devforum.zoom.us/u/juangilbert)\
**Post date:** [December 14, 2022, 1:53pm UTC](https://devforum.zoom.us/t/joining-meeting-timeout-signature-is-invalid/80299/1 "2022-12-14T13:53:27Z")

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I am using the CDM sample form [GitHub - zoom/meetingsdk-web-sample: Zoom Meeting SDK Web Sample App](https://github.com/zoom/meetingsdk-web-sample) and I am getting the “Joining meeting timeout - Signature is invalid” error everytime I attempt to join. I am using the meeting ID from my professional Zoom account. I have an JWT app account with the appropriate key and secret. What am I missing?

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<div class="post-metadata">

**Author:** ![ojus.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ojus.zoom/32/734_2.png) [@ojus.zoom](https://devforum.zoom.us/u/ojus.zoom)\
**Post date:** [December 16, 2022, 4:59pm UTC](https://devforum.zoom.us/t/joining-meeting-timeout-signature-is-invalid/80299/2 "2022-12-16T16:59:10Z")

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Hi @juangilbert ,

Can you make sure that you are following the guidelines mentioned here: [https://marketplace.zoom.us/docs/sdk/native-sdks/auth/#2-generate-the-meeting-sdk-jwt](https://marketplace.zoom.us/docs/sdk/native-sdks/auth/#2-generate-the-meeting-sdk-jwt) ?

If you continue to get the error, I would [decode](https://www.base64decode.org/) the signature. The output values should match the following:

```auto

  "appKey": SDK_KEY,
  "sdkKey": SDK_KEY,
  "mn": MEETING_NUMBER,
  "role": ROLE,
  "iat": 1646937553,
  "exp": 1646944753,
  "tokenExp": 1646944753
```