Can’t verify domain

Hello,

I can’t verify my domain. My server provider told me that my server doesn’t accept hidden files, so that’s why you see nothing after clicking on “veryfying button” and my site can’t be verified.

I also don’t have cpanel and any other access to my server.

How can I proof that I’m the owner of the website?

Thank you.

The page I need help with: [log in to see the link]