### Steps to reproduce

1. Login as a user with all meetings permissions

2. Begin of the insertionHave a custom cover text color set in the CustomStyles section `/admin/design?tab=pdf_export_styles`

3. End of the insertion Go to any meeting

Begin of the insertion4.End of the insertion Begin of the deletion 3.End of the deletion Click on the upper right 3 dot menu

Begin of the insertion5.End of the insertion Begin of the deletion 4.End of the deletion Click on Export PDF

Begin of the insertion6.End of the insertion Begin of the deletion 5.End of the deletion On modal, keep the default options and click on Download


Begin of the insertionNote: This issue occurs for all PDF exports with a cover page, e.g. Work packages report.

End of the insertion ### What is the buggy behaviour?

* PDF export fails


### What is the expected behaviour?

1. PDF export is successful


### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/774802/content">

### Environment information

**OpenProject version**

Core build

[a58dc7df32e9b64d8b1e587321014eee0b98cd84](https://github.com/opf/openproject/commits/a58dc7df32e9b64d8b1e587321014eee0b98cd84)

Product version

[10e25f6d79fbcf80d413aece21717242de48159d](https://github.com/opf/saas-openproject/commits/10e25f6d79fbcf80d413aece21717242de48159d)

Core version

OpenProject 16.4.0

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

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