Experiment code missing the cookie domain name declared in tracking code

If you still dont know why you get the error:

Your google analytics code had "subdomain" enabled mode. for example www.igloro.info is main domain, and kambariokai.igloro.info is subdomain and it has enabled subdomain mode.
When I have tried to create experiment I got the error.

Solution:

1. Open your google analytics code and copy _setDomainName.
2. Open code which you have added into your . And add code before experiment code replacing domain name with your one: