我是否需要安装WordPress MU域映射插件才能使用WordPress Multisite

Question

Have been trying to setup and configure WordPress Multisites on my domain. I have installed and activated the "Sub Domain" install.

I am simply looking to create site likes this.

Main website:

http://www.example.com

Sub Domain Sites:

http://docs.example.com

http://demo.example.com

So far I have created the sub domain http://docs.example.com in the WordPress Dashboard. To be able to access the WordPress Dashboard for this sub domain I had to create a sub domain in cPanel that pointed docs to the public_html directory. Also in my VPS.net hosting panel I had to create an A Record for docs pointing to the IP address of my server

My issue is that when I try and view http://docs.example.com in a web browser I always get a blank white screen.

Do I need the WordPress MU Domain Mapping plugin installed to use WordPress Multisite. I have installed it previously but it didn't make a difference.

Any advise would be greatly appreciated. Thanks