# Sinch Errors

Select an error from the table below to read more about it and view troubleshooting steps and information.

| Error | Description |
|  --- | --- |
| [Validation Error](/docs/errors/registry/validation-error) | The request was well-formed but unable to be followed due to semantic errors. |
| [Not Found](/docs/errors/registry/not-found) | The requested resource could not be found. |
| [Invalid Credentials](/docs/errors/registry/invalid-credentials) | The request credentials were missing, malformed, or invalid. |
| [Access Token Expired](/docs/errors/registry/access-token-expired) | The bearer token has expired and a new token must be generated. |
| [Permission Denied](/docs/errors/registry/permission-denied) | The access key does not have permission to access the requested resource. |