Subdomains give 404 in Admin area and show Bluehost site when visiting

I have created a wildcard already for subdmains (using Multisite). I think this works. But at the end the system doesn't work. When I create a new site and visit the subdomain I see the site of Bluehost and in my admin area, when I go to my new sites, I get a 404 error.

What to do? I have enabled grant access...