Catchable fatal error: breadcrumbs

Hi,

I keep getting this error message:
Catchable fatal error: Object of class WP_Error could not be converted to string in /nfs/c09/h01/mnt/128610/domains/greatecology.com/html/wp-content/themes/greatecology/fn_breadcrumb.php on line 51

If I try to access this page from the home page it works perfectly, but under our services page the link breaks.

The coding up to line 51 is below.
<?php

function the_breadcrumb() {

$delimiter = ‘ / ‘;
$name = ‘Home’; //text for the ‘Home’ link
$currentBefore = ‘<span class=”current-item”>’;
$currentAfter = ‘</span>’;

if ( !is_home() && !is_front_page() || is_paged() ) {

echo ‘<div id=”crumbs”>’;

global $post;
$home = get_bloginfo(‘url’);
echo ‘‘ . $name . ‘ ‘ . $delimiter . ‘ ‘;

if ( is_category() ) {
global $wp_query;
$cat_obj = $wp_query->get_queried_object();
$thisCat = $cat_obj->term_id;
$thisCat = get_category($thisCat);
$parentCat = get_category($thisCat->parent);
if ($thisCat->parent != 0) echo(get_category_parents($parentCat, TRUE, ‘ ‘ . $delimiter . ‘ ‘));
echo $currentBefore . ”;
single_cat_title();
echo ” . $currentAfter;

} elseif ( is_day() ) {
echo ‘‘ . get_the_time(‘Y’) . ‘ ‘ . $delimiter . ‘ ‘;
echo ‘‘ . get_the_time(‘F’) . ‘ ‘ . $delimiter . ‘ ‘;
echo $currentBefore . get_the_time(‘d’) . $currentAfter;

} elseif ( is_month() ) {
echo ‘‘ . get_the_time(‘Y’) . ‘ ‘ . $delimiter . ‘ ‘;
echo $currentBefore . get_the_time(‘F’) . $currentAfter;

} elseif ( is_year() ) {
echo $currentBefore . get_the_time(‘Y’) . $currentAfter;

} elseif ( is_single() && !is_attachment() ) {
$cat = get_the_category(); $cat = $cat[0];
echo get_category_parents($cat, TRUE, ‘ ‘ . $delimiter . ‘ ‘);
echo $currentBefore;
the_title();
echo $currentAfter;

} elseif ( is_attachment() ) {
$parent = get_post($post->post_parent);
$cat = get_the_category($parent->ID); $cat = $cat[0];
echo get_category_parents($cat, TRUE, ‘ ‘ . $delimiter . ‘ ‘);

Please help I have no idea what to do.
Thanks!