---
title: Troubleshoot ZITADEL
description: "Resolve common ZITADEL self-hosting issues, including instance not found and upstream header errors during deployment troubleshooting"
---

import InstanceNotFound from "../../../self-hosting/deploy/troubleshooting/_instance_not_found.mdx";

import UpstreamHeader from "../../../self-hosting/deploy/troubleshooting/_upstream_header.mdx"

## Instance not found

<InstanceNotFound components={props.components} />

## upstream sent too big header while reading response header from upstream

<UpstreamHeader components={props.components} />