### Steps to reproduce

Begin of the deletion <br>

End of the deletion 1. Login as a user with permissions to manage storages

2. Go to the members page

3. Configure nextcloud storage

4. Add this storage to a project

5. Go to one of the project&#39;s work packages

6. Click login button

7. Give an access on the Nextcloud

8. Get an error on the OpenProject part


### What is the buggy behavior?

The error should not be present.&nbsp;

Begin of the insertion<img class="image_resized op-uc-image op-uc-image_inline" style="width:738px;" src="/api/v3/attachments/921627/content">End of the insertion Begin of the deletion <br>End of the deletion

### What is the expected behavior?

The login button should work and oauth should work for the Nextcloud (or other storages)

<br>

**OpenProject version - current one.**

<br>

**Browser**

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

**Operating System**

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

**Language**

_Please specify the browser language and the language of the OpenProject user for which the bug occurred._