Xenforo Making duplicate live site to test XF 2.3

Now that XF 2.3 RC has been released, I'm attempting to create a /test/ folder on my live site and install a copy of my site there for testing.

This is the guide I have followed
How to duplicate a live site to use as a test site

Afterward, I go to the livesite/test/ expecting to see a copy of the site but it's blank with no errors at all.
I couldn't login to ACP from /test/admin.php because it's blank as well.

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There is no error from nginx, server, etc.

Where do I start to investigate the issues? Alternatively, is there a guide for centminmod users to make a duplicate site for testing?

 

Just use option 2 in the centminmod menu to create a new vhost?