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

# Troubleshooting

> Common errors, failed tasks, missing outputs, and support details.

## I get a 401 error. What should I check?

Confirm that the `Authorization` header is present, uses the `Bearer` scheme, and contains a valid API key.

## I get a 400 error. What should I check?

Open the model page in the API Reference and compare your request against the schema. Check required fields, enum values, URL fields, and model-specific options.

## My task is still processing. What should I do?

Keep polling with a reasonable interval. Video generation can take several minutes. Stop and surface an error if the task does not complete within your product's timeout window.

## My task failed. What should I include in logs?

Log the model name, endpoint, request payload, `task_id`, `request_id`, status, and error message. Do not log API keys.

## What should I include when contacting support?

Include the `request_id`, `task_id`, model name, endpoint, request payload, approximate request time, and the observed error. Do not share your API key.