# Bug OP-2558 - 404 error displayed when clicking on empty assignee field

Project: OpenProject
Status: closed
URL: https://community.openproject.org/work_packages/OP-2558

## Open points

_No work packages_

## Details

| Attribute | Value |
| --- | --- |
| Date |  |
| Priority | Medium |
| Module |  |
| Target versions | 5.0.8 |
| Observed in versions |  |
| Sprint |  |
| Backlog bucket |  |
| Bug found in version (deprecated) |  |
| Found in mobile app version |  |
| Follow-up feedback e-mail |  |
| Requires doc change | No |
| Accessibility | No |
| Pull preview |  |
| List |  |
| Labels |  |

## People

| Attribute | Value |
| --- | --- |
| Assignee |  |
| Accountable |  |
| Product manager |  |
| Developers |  |
| Designer |  |
| Ordered by |  |
| Signed off by |  |
| Interest by |  |

## Planning

| Attribute | Value |
| --- | --- |
| Relevance |  |

## Costs

| Attribute | Value |
| --- | --- |
| Votes |  |
| Work |  |
| Labor costs |  |

## Description

**Preconditions**

  - Work package module activated.
  - Assignee column displayed in work package list.
  - Work packages exist and at least one does not have an assignee.

**Steps to reproduce**

1.  Go to work package list.
2.  Click on empty assignee field.

**Actual behavior**

  - Error 404 is displayed.
      - Link to \[instance-name\]/users/null

**Expected behavior**

  - Link is still on empty assignee so that the accessibility requirement is satisfied, however the link does not lead to a 404 page (possibly deactivated).

**Screenshot**  
![](Bug_userNull.png)

**QA system**

  - org-dev.qa.finn.de
  - OpenProject 5.0.0