Griddify - Not Generating Grids CS6

We just downloaded and installed Griddify (unzipped and copied to the appropriate folder per instructions), and when attempting to create grid lines nothing happens.

The Griddify panel shows up, we can enter numbers but no grids are being created.

Start by reproducing the failure in the Griddify panel after following the installation instructions and entering grid values. Check the panel's grid-line creation entry point and compare the expected result with the reported behavior; done means creating grid lines works in Photoshop CS6.

Written by the indexing model from the issue text.