---
schema: rendered-html/v1
title: "REST API Troubleshooting | Developer Portal for YouTrack and Hub Documentation"
source_url: https://www.jetbrains.com/help/youtrack/devportal/api-troubleshooting.html
generated_at: 2026-06-10T05:36:25.547482+00:00
---






- [Get Started with REST API](jetbrains__com__help__youtrack__devportal__api-getting-started.md)
- [REST API Reference](jetbrains__com__help__youtrack__devportal__rest-api-reference.md)
- [REST API Use Cases](jetbrains__com__help__youtrack__devportal__api-use-cases.md)
- [REST API Troubleshooting](api-troubleshooting.html)
- 400 Bad Request When Adding a Custom Field Value to a Set
- 400 Bad Request When Creating an Issue Without Required Field Value
- 400 Bad Request When Updating a Conditional Field
- 500 Server Error When Updating a Custom Field
- 500 Server Error When Adding a Field to a Project
- [Color Indices List](jetbrains__com__help__youtrack__devportal__color-indices.md)

1. [YouTrack REST API](jetbrains__com__help__youtrack__devportal__youtrack-rest-api.md)
2. [REST API Troubleshooting](#0)

# REST API Troubleshooting﻿

Last modified: 07 May 2026

In this section, you will find:

- Examples of errors you might get while making requests to YouTrack REST API.
- Suggestions how to update these requests and fix the errors.

Here is the list of topics in this section:

- 400 Bad Request When Adding a Custom Field Value to a Set
- 400 Bad Request When Creating an Issue Without Required Field Value
- 400 Bad Request When Updating a Conditional Field
- 500 Server Error When Updating a Custom Field
- 500 Server Error When Adding a Field to a Project

Add User to Project Team400 Bad Request When Adding a Custom Field Value to a Set


