When I try to update a Wordpress website on a server I do not own since it is from an hosting provider. I am getting an error I never had.

Translated to English (it is Dutch)

Download update from .4.1.zip…

The authenticity of wordpress-5.4.1.zip could not be verified because no signature was found.

Unpacking update…

Cannot copy file: wordpress/wp-includes/capabilities.php

Installation failed

I have chmod all folders to 755 and all files to 655. But when I look at the file and folder I see. wordpress/wp-includes/capabilities.php

But when I look in my Filezilla, this folder don't seems to exist at all (or I cannot find this)

Now I was wondering if this is due to certain permissions (chown). Or that the zip file (from Wordpress) is placed incorrectly (and how I can find that out). I have never encountered this problem before.