### Steps to reproduce

1. Setup a storage connection between OpenProject and Nextcloud, including automatically managed project folders

2. Ensure that Nextcloud has [windows compatible file names](https://docs.nextcloud.com/server/stable/admin_manual/configuration_files/windows_compatible_filenames.html) enforced Begin of the insertion

1. Alternatively configure `forbidden_filename_characters` via `occ`/`config.php`

End of the insertion Begin of the deletion

End of the deletion 3. Create a project that contains invalid characters, e.g. a colon: `My forbidden project: This`


### What is the buggy behavior?

Creation of the automatically managed project folder fails.

### What is the expected behavior?

Creating the project folder should succeed, silently replacing unsupported characters.

### Environment information

**OpenProject version**

17.1 (essentially independent of OpenProject version)

**Nextcloud version**

31 and above (there are also repro steps for lower versions)