### Steps to reproduce

1. Create a work package

2. In the description add a link with an encoded space Begin of the insertionor umlautEnd of the insertion in a URL path, for example Begin of the insertion[`https://www.test.org/foo/1%20bar/baz`](https://www.test.org/foo/1%20bar/baz)  or `https://example.com/?ümlaut=1`End of the insertion Begin of the deletion [https://www.test.org/foo/1%20bar/baz](https://www.test.org/foo/1%20bar/baz)End of the deletion

3. After having saved the work package and viewing it, click on the link


### What is the buggy behavior?

* The user gets redirected to the OpenProject installation's home page (/)


### What is the expected behavior?

* The user should be redirected to [https://www.test.org/foo/1%20bar/baz](https://www.test.org/foo/1%20bar/baz)


### Workaround

Instead of clicking it, select the text of the link, copy it, and paste it into the browser.

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### Environment information

**OpenProject version**

_v17.1.0_

### Comments

The captured link for the example would look like this:

[https://my.openproject.com/external\_redirect?url=https://www.test.org/foo/1%2520/baz](https://my.openproject.com/external_redirect?url=https://www.test.org/foo/1%2520/baz)

The slashes etc. would've been encoded too (to `%2F` for instance) but I ommitted that here for readability.