# Error Codes

When developing your application with Vercel, you may encounter a variety of errors. They can reflect issues that happen with external providers such as domain services or internal problems at the level of your application's deployment or your usage of platform features.

For general error handling guidance, that covers dashboard related errors, see [General Errors](/docs/errors/error-list).

## Application errors

## Platform errors


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title: "Flags SDK"
description: "The Flags SDK is a free open-source library that gives developers the tools they need to use feature flags in Next.js and SvelteKit applications."
last_updated: "2026-02-03T02:58:42.378Z"
source: "https://vercel.com/docs/feature-flags/feature-flags-pattern"
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