### Steps to reproduce

<br>

1. Login as an admin user

2. Navigate to Administration -&gt; Design -&gt; PDF export styles

3. Under &quot;Custom Export Logo&quot;, add a new logo: A .png file Begin of the insertion**with an Umlaut üöä**End of the insertion Begin of the deletion **without** backgroundEnd of the deletion

4. Upload the logo and generate a demo pdf via the menu above


### What is the buggy behavior?

<br>

* The logo will not be displayed, OpenProject&#39;s logo is displayed instead


### What is the expected behavior?

<br>

1. The custom logo replaces OpenProject&#39;s logo in all PDF exports


### **Logs**

None.

### Screenshots and other files

<br>

### Environment information

<br>

**OpenProject installation type**

* Hosted cloud edition

<br>


**OpenProject version**

_17.1.1_

**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_