# Error Codes TapTalk.io SDK has two different types of error codes, which are: [Server Error Codes](#server-error-codes): This error caused by server-side issues.\ [Client Error Codes](#client-error-codes): This error caused by client-side issues such as invalid parameters and validation handling. ### Server Error Codes Server-side error codes generally contain five-digit integers beginning with **4xx** and **5xx**.
| **Error Codes** | **Description** | | --------------- | --------------------------------------------------------------------------------------------------------------------------------------- | | 40001 | HTTP request header validation failed. | | 40002 | API request parameter validation failed. | | 40101 | The request failed because HTTP request header Authorization is not provided when required. | | 40102 | The request failed because HTTP request header Authorization format is invalid. | | 40103 | The request failed because the server failed to parse the token or the token is not found or invalid. Client should get a new token. | | 40104 | The request failed because the token has expired. Client should get a new token. | | 40105 | The request failed because the token owner does not belong to the client's info. Client should get a new token. | | 40106 | The request failed because the user is not found for the specified token. | | 49101 | The authentication request failed because the app key is not provided. | | 49102 | The authentication request failed because server failed to parse the app key, or the app key is invalid. | | 49103 | The authentication request failed because the provided app key is not found. | | 49104 | The authentication request failed because the provided app key is not intended to be used with the client's platform. | | 49106 | The authentication request failed because the app key has expired. | | 49201 | The authentication request failed because the app is not enabled by the customer. | | 49202 | The authentication request failed because the app is not available because either the app, project, or customer is currently suspended. | | 49203 | The authentication request failed because the app is not found. | | 50001 | The authentication request failed because an error occurred while validating the app key. | ### Client Error Codes Client-side error codes generally contain five-digit integers beginning with **9xx**. | **Error Codes** | **Description** | | --------------- | --------------------------------------------------------------------------------------- | | 90001 | The request failed because TapTalk.io active user is not found. | | 90002 | The request failed because access token is not available, authentication is needed. | | 90003 | The request failed because user already connected to TapTalk.io. | | 90004 | The request failed because the device is not connected to the server. | | 90005 | The request failed because provided authentication ticket is invalid. | | 90006 | The request failed because user is not authenticated. | | 90101 | The request failed because the selected group chat has already been deleted. | | 90102 | The request failed because another admin needs to be assigned before leaving the group. | | 90301 | The request failed because file URI data was not found. | | 90302 | The request failed because maximum file size was exceeded. | | 90303 | The server failed to process the file upload due to user cancellation. | | 90304 | The request failed because image compression was unsuccessful. | | 90305 | The request failed because an invalid message type was provided. | | 90306 | The request failed because media caption exceeds the character limit. |