->url() is incomplete

Hello everyone

the part in the blueprint look like this:

label: Logo
type: files

I want to get this file in my template with this:

<img src="<?= page('about')->logo()->url() ?>">

And finally in the browser I get this (with the correct image tag around):

src="- logo_25.jpg

How can I get the working url from this image?

See the docs: https://getkirby.com/docs/reference/panel/fields/files#how-to-use-in-templates-snippets

Thanks, now it works.