I want to set up a URL at academy.mysite.com. I added an A record in the DNS settings, pointing academy.mysite.com to the IP address of my Multisite installation.
When adding the site and entering academy.mysite.com and some aliasses in the domain mapping settings I got this error message:
Warning: is_writable(): open_basedir restriction in effect. File(/) is not within the allowed path(s): (/srv/www/vhosts/multisitedomain.com/:disappointed:tmp/) in /srv/www/vhosts/multisitedomain.com/httpdocs/wp-admin/options-permalink.php on line 133
It sounds as if "academy" is not an allowed (or listed) part of the URL. The message disappeared after logging out and in again, and the site works. Anyhow, I wonder if something went wrong or if I need to adjust more settings (e.g. add "academy" to some list).
Thanks for your ideas on this.