The plugin is producing a lot of warnings and notices – nearly 200 – and left me with a mostly-unreadable screen. Variables need to be initialized to ensure their existence before use – or checked for with !empty() or isset() before use. You can catch these types of issues by installing new plugins on a brand new installation of ClassicPress with full error reporting enabled (such as with the PHP Error Log Viewer plugin.)
It’s very possible that you do (have warnings/notices enabled).
Thing is: a common issue during plugin development is that sometimes you end up with bits of data stored in the database as you develop – the plugin can work fine without first checking for variables…because they do exist. However, when you install the plugin on a brand new site (which surely doesn’t have those random bits of data in the database,) the warnings then become apparent.
This same issue has gotten me a bunch of times. Installing the plugin on a new site that has never seen it before always reveals these “hidden” issues.
