# Common API errors for AppFabric for productivity (preview)
<a name="productivity-common-errors"></a>


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| The AWS AppFabric for productivity feature is in preview and is subject to change. | 

This section lists the errors common to the API actions for the AWS AppFabric productivity features.

For all other AppFabric common API errors, see [Troubleshoot AppClients in AppFabric for productivity](ahead-app-dev-errors.md) and [AWS AppFabric API common errors](https://docs.aws.amazon.com/appfabric/latest/api/CommonErrors.html) in the *AWS AppFabric API Reference*.


| Exception name | Description | 
| --- | --- | 
|  **TokenException**  |  The token request is not valid. HTTP Status Code: 400  |