Category Cloud plugin

Hi everyone…
I know I’m taking a chance by asking this, but is there anyone here who can make the code on this plugin validate?
https://www.mapelli.info/web20/category-cloud-16#comment-15221
I’ve contacted the plugin author, no response yet. This plugin does exactly what I need it to do as far as adding categories to the cloud plus being able to specify colors…But unfortunately the code is not valid and that worries me. Is there anyone who is willing to take a look?