# Bug OP-6100 - Internal error when setting assignee

Project: OpenProject
Status: closed
URL: https://community.openproject.org/work_packages/OP-6100

## Open points

_No work packages_

## Details

| Attribute | Value |
| --- | --- |
| Date |  |
| Priority | Medium |
| Module |  |
| Target versions | 10.0.0 |
| Observed in versions | 10.5.0 |
| Sprint | 10.0.0 |
| Backlog bucket |  |
| Bug found in version (deprecated) | 10.5.x |
| 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

### **Environment**:

qa.openproject-edge.com

Firefox

### **Steps to reproduce:**

1.  Go to https://qa.openproject-edge.com/projects/copz-aaaaaa/work\_packages/1300/activity?query\_props=%7B%22c%22%3A%5B%22id%22%2C%22subject%22%2C%22type%22%2C%22status%22%2C%22assignee%22%2C%22updatedAt%22%5D%2C%22hi%22%3Afalse%2C%22g%22%3A%22%22%2C%22t%22%3A%22updatedAt%3Adesc%22%2C%22f%22%3A%5B%7B%22n%22%3A%22status%22%2C%22o%22%3A%22o%22%2C%22v%22%3A%5B%5D%7D%5D%2C%22pa%22%3A1%2C%22pp%22%3A100%2C%22dr%22%3A%22card%22%7D
2.  Set assignee

### **Actual Behavior**

Error

![](/api/v3/attachments/16127/content)

### **Expected Behavior**

No error