# UI Toolkit error codes

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The SDK returns the following error codes from `onError` and are of the type `UiToolkitError`.

| Error Enum                      | Description                                                                                       |
| ------------------------------- | ------------------------------------------------------------------------------------------------- |
| `EMPTY_KEY_OR_SECRET`           | Authentication error, no key or secret found.                                                     |
| `INVALID_KEY_OR_SECRET`         | Authentication error, wrong key or secret.                                                        |
| `EMPTY_SESSION_NAME`            | Join session error, no tpc (topic) name.                                                          |
| `EMPTY_SESSION_TOKEN`           | Join session error, no session token.                                                             |
| `TOKEN_EMPTY_SESSION_NAME`      | Join Session error, No session name within token.                                                 |
| `EMPTY_USERNAME`                | Join session error, no session user name.                                                         |
| `INVALID_SESSION_NAME`          | Join session error, invalid session name.                                                         |
| `WRONG_PASSWORD`                | Join session error, invalid session password.                                                     |
| `INVALID_SESSION_TOKEN`         | Join session error, invalid session token.                                                        |
| `MISSING_PASSWORD`              | Join session error, missing session password.                                                     |
| `SESSION_NAME_TOO_LONG`         | Join Session error, session name too long.                                                        |
| `TOKEN_MISMATCHED_SESSION_NAME` | Join session token error, mismatched session name.                                                |
| `TOKEN_USER_IDENTITY_TOO_LONG`  | Join session token error, user identity too long ([now named `user_key`](/docs/video-sdk/auth/)). |
| `INVALID_PARAM`                 | Join session error, invalid parameter.                                                            |
| `JOIN_FAILED`                   | Join session error,Failed to join session.                                                        |
| `NO_MICROPHONE_PERMISSION`      | Session error, no microphone permission.                                                          |
| `NO_CAMERA_PERMISSION`          | Session error, no camera permission.                                                              |
| `CAMERA_SWITCH_FAILED`          | Session error, failed to switch camera.                                                           |
| `LEAVE_SESSION_FAILED`          | Session error, failed to leave session.                                                           |
| `MUTE_MIC_FAILED`               | Session error, failed to mute mic.                                                                |
| `UNMUTE_MIC_FAILED`             | Session error, failed to unmute mic.                                                              |
| `START_CAMERA_FAILED`           | Session error, failed to start video.                                                             |
| `STOP_CAMERA_FAILED`            | Session error, failed to stop video.                                                              |
| `SEND_MESSAGE_FAILED`           | Session error, failed to send message.                                                            |