6
With XOOPS 2.0.11 there is no profiles module. You will find User profiles in the system settings, it is not a module, it is part of the system.
But this:
C:\apachefriends\xampp\htdocs\Xoops\html\modules\profile\class\category.php on line 79 - huh?
Sounds like you have version 2.1.0 or 2.1.1 installed, which is still in development, and will have errors.