Begin of the insertion**Preconditions**

- Wiki module activated.
- Timeline exists.

**Steps to reproduce**

1. Go to wiki page and include two timelines via wiki macro (
2. Save page.

**Actual behavior**

- Timeline doesn’t finish loading.
- Console errors:

**Expected behavior**

- Timelines displayed.

**Example**

- https://openproject-org.qa.finn.de/projects/openproject/wiki/Members
- https://enterprise-stable.qa.finn.de/projects/test-robin/wiki/Wiki

**QA system**

- openproject-org.qa.finn.de
- OpenProject 4.0.1
- OpenProject 4.1.0End of the insertion