I'm helping a client who has a version 18.4 database with multiple websites. He wants one main website, with the other websites set up on subdomains. The main website is set up, and now I'm trying to set up the subdomains. The instructions say to add the subdomain in the Odoo website, which I've done. When I try to go to the subdomain, it says "Page Not Found". Is there a missing step that is not in the instructions?

Thanks,
Shane.