Tracking code missing the cookie domain name declared in experiment code: _udn is solution!

Good day.

Today I've encountered this error when trying to setup Google Analytics Experiment.

Tracking code missing the cookie domain name declared in experiment code:

Analytics offers help on this issue, but their help page shows 404.

If you want to resolve this in less than a minute - read further.

<!-- Google Analytics Content Experiment code -->
<script>
_udn = "YOUR-DOMAIN.com";
</script>
<script>function utmx_section(){}function utmx(){}(function(){var
........other script code.

See? That's all you have to add to your Analytics Experiment code to make it work!

Thanks and share.