# Flutter zoom video sdk error invalid params

**URL:** <https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104>\
**Category:** Flutter\
**Tags:** video-sdk\
**Created:** [January 3, 2024, 7:10am UTC](https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104 "2024-01-03T07:10:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![thinakaran.s](https://avatars.discourse-cdn.com/v4/letter/t/b5a626/32.png) [@thinakaran.s](https://devforum.zoom.us/u/thinakaran.s)\
**Post date:** [January 3, 2024, 7:10am UTC](https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104/1 "2024-01-03T07:10:41Z")

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Hi, @kwaku.nyante I am stuck below the error, would you please explain why I got this error? thanks in advance.

D/ZoomVideoSdkDebug(10733): onError, error: ZoomVideoSDKError\_JoinSession\_Token\_RoleType\_EmptyOrWrong

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**Author:** ![ekaansh.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ekaansh.zoom/32/55004_2.png) [@ekaansh.zoom](https://devforum.zoom.us/u/ekaansh.zoom)\
**Post date:** [January 3, 2024, 12:29pm UTC](https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104/2 "2024-01-03T12:29:29Z")

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Hi, the error reads `RoleType_EmptyOrWrong`. To double check, have you passed in a `role_type` to the JWT that you generated? The value needs to be `1` or `0`.

You can find more information about generating the token here: [Video SDK - Authorize](https://developers.zoom.us/docs/video-sdk/auth/#payload).

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<div class="post-metadata">

**Author:** ![thinakaran.s](https://avatars.discourse-cdn.com/v4/letter/t/b5a626/32.png) [@thinakaran.s](https://devforum.zoom.us/u/thinakaran.s)\
**Post date:** [January 3, 2024, 1:01pm UTC](https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104/3 "2024-01-03T13:01:03Z")

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Thank you @ekaansh.zoom

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**Author:** ![ekaansh.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ekaansh.zoom/32/55004_2.png) [@ekaansh.zoom](https://devforum.zoom.us/u/ekaansh.zoom)\
**Post date:** [January 4, 2024, 11:13am UTC](https://devforum.zoom.us/t/flutter-zoom-video-sdk-error-invalid-params/101104/4 "2024-01-04T11:13:56Z")

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