> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dubformer.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Error Handling

> Understanding API errors and how to handle them

## Common Error Types

### ValidationError

Occurs when request parameters are invalid or missing.

<ResponseExample>
  ```json ValidationError Example theme={null}
  {
    "error": "ValidationError",
    "message": "language is required"
  }
  ```
</ResponseExample>

**Common causes:**

* Missing required fields
* Invalid language codes
* Malformed request body
* Invalid parameter values

**How to fix:**

* Check all required fields are provided
* Validate language codes
* Ensure request body is valid form-data

### UnauthorizedError

Occurs when authentication fails.

<ResponseExample>
  ```json UnauthorizedError Example theme={null}
  {
    "error": "UnauthorizedError", 
    "message": "Invalid API key"
  }
  ```
</ResponseExample>

**Common causes:**

* Missing Authorization header
* Invalid API key
* Expired API key
* Wrong API key for the environment

**How to fix:**

* Include `Authorization: Bearer YOUR_API_KEY` header
* Verify your API key is correct and active
* Generate a new API key if needed