The error seems to indicate that you don't have mySQL properly installed and/or configured. You should also make sure that you have WordPress updated to the latest version, as well as having the latest Vertex Upgrade Patch
If you don't have any existing content, you can follow instructions on the Wordpress FAQ
for installing a Site Shaper. There are even instructions for how to install the shaper on top of an existing WordPress install, but it will erase all existing content and settings, so it can only be done if you don't have anything you want to save.