Is this causing issues for anyone?

I remember reading somewhere that this plugin is still being developed, so that it can be integrated with your custom theme. If you did a couple of minutes of digging to check the output you’d easily have found the classes that are wrapped around the various parts of the theme.

Is this still being developed? Is it causing issues on my site?
For example: https://www.smoladesigns.ca is using it but might be causing PHP errors or JS errors.