Plugin error after installation

The problem is defiantly not with the theme or any specific plugin. The problem is the fatal error thrown anytime an include or require is seen.

My only other suggestion is to open your php.ini file and find the line

include_path=".:/usr/local/lib/php"

and comment it out by placing a ; infront of it so it looks like this:

;include_path=".:/usr/local/lib/php"

This will cause php to use the default include path which might fix the problem.

After you make the change restart apache $ /etc/init.d/apache2 restart or $ /etc/init.d/httpd restart or $ service httpd restart depending on what distro of linux your running.