ad-minister

I received the following when clicking tools/ad minister:

Catchable fatal error: Object of class WP_Error could not be converted to string in /home2/dotcomro/public_html/pacificstoneconstruction/wp-includes/functions.php on line 302

This is line 302:

// Allow plugins to short-circuit options.
line 302: $pre = apply_filters( ‘pre_option_’ . $option, false );
if ( false !== $pre )
return $pre;

Can someone tell me the problem?

Thanks,

artw1