---
title: Errors
description: Fix common mistakes when creating and executing workflows.
type: overview
summary: Browse and resolve common workflow errors.
related:
  - /docs/foundations/errors-and-retries
---

# Errors



Fix common mistakes when creating and executing workflows in the **Workflow SDK**.

<Cards>
  <Card href="/docs/errors/fetch-in-workflow" title="fetch-in-workflow">
    Learn how to use fetch in workflow functions.
  </Card>

  <Card href="/docs/errors/hook-conflict" title="hook-conflict">
    Learn how to handle hook token conflicts between workflows.
  </Card>

  <Card href="/docs/errors/node-js-module-in-workflow" title="node-js-module-in-workflow">
    Learn how to use Node.js modules in workflows.
  </Card>

  <Card href="/docs/errors/serialization-failed" title="serialization-failed">
    Learn how to handle serialization failures in workflows.
  </Card>

  <Card href="/docs/errors/start-invalid-workflow-function" title="start-invalid-workflow-function">
    Learn how to start an invalid workflow function.
  </Card>

  <Card href="/docs/errors/timeout-in-workflow" title="timeout-in-workflow">
    Learn how to handle timing delays in workflow functions.
  </Card>

  <Card href="/docs/errors/webhook-invalid-respond-with-value" title="webhook-invalid-respond-with-value">
    Learn how to use the correct `respondWith` values for webhooks.
  </Card>

  <Card href="/docs/errors/webhook-response-not-sent" title="webhook-response-not-sent">
    Learn how to send responses when using manual webhook response mode.
  </Card>

  <Card href="/docs/errors/corrupted-event-log" title="corrupted-event-log">
    Learn how to handle corrupted or invalid event logs.
  </Card>

  <Card href="/docs/errors/step-not-registered" title="step-not-registered">
    Resolve step not registered errors caused by deployment mismatches.
  </Card>

  <Card href="/docs/errors/workflow-not-registered" title="workflow-not-registered">
    Resolve workflow not registered errors caused by deployment mismatches.
  </Card>
</Cards>

## Learn More

* [API Reference](/docs/api-reference) - Complete API documentation
* [Foundations](/docs/foundations) - Architecture and core concepts
* [Examples](https://github.com/vercel/workflow) - Sample implementations
* [GitHub Issues](https://github.com/vercel/workflow/issues) - Report bugs and request features


## Sitemap
[Overview of all docs pages](/sitemap.md)