### Steps to reproduce

<br>

1. Login with a user account which has permissions to manage boards in a projekt

2. Open any board in a project

3. Select a columm, klick on \[ &nbsp;+   \] -&gt; _Add new card_

4. Give your new card a name and do NOT hit ENTER

5. Double click on the unsaved card in order to open the work package


### What is the buggy behavior?

<br>

* A (correct) 404 error is displayed

* Navigation to the previous page breaks page layout


### What is the expected behavior?

_Describe how the application should behave like. Example:_

1. Begin of the insertionAs long as the WP isEnd of the insertion Begin of the deletion It shouldEnd of the deletion not Begin of the insertionsaved,End of the insertion Begin of the deletion be possible to open a not saved work package OREnd of the deletion the Begin of the insertiondouble click does not do anythingEnd of the insertion Begin of the deletion error message indicates what happend

2. The board layout can be used further after a user hits ← in their briowser to open the previous page againEnd of the deletion


###

### **Logs**

`[Error 404] The page you were trying to access doesn't exist or has been removed.`

### Screenshots and other files

<br>

See attached _Boards-404.mp4_

### Environment information

<br>

**OpenProject installation type**

* Hosted cloud edition


**OpenProject version**

_17.2_

**Browser**

* [ ] Chrome
* [ ] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [x] Other (Vivaldi)

**Operating System**

* [x] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [ ] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)

**Language**

_DE/EN tested_