Begin of the insertion**Preconditions**

- Work package module activated.
- Languages set to German.

**Steps to reproduce**

1. Go to timeline module.
2. Create timeline report if none exists. -\> Error
3. Optional: Embed timeline in project overview -\> Error

**Actual behavior**

- Javascript error prevents timeline from being displayed
- This error does not occur in English, French or Spanish.
- [Example Link](https://qa.openproject-edge.com/projects/demo-project/timelines/1)

**Expected behavior**

- Timeline displayed properly.

**Screenshots**

**QA system**

- qa.openproject-edge.com
- OpenProject 5.1.0End of the insertion