I was running 2 wordpress multi-site sub-domain base in WP 3.7.4. After upgrading to the latest version (4.0) the sub-domains are not working at all. Whenever I am trying to open the sub domain it is returning me to the main domain.
Can any one tell me why this is not working after up-gradation? What do we need to look for to make this working properly.
Need urgent help.
