invalid argument for each()

Hello,

I am having a bug on this page:

http://www.mywherecanifind.com/questions/ask/

Warning: Invalid argument supplied for foreach() in /home/content/04/9655804/html/wp-content/themes/parallelus-salutation/functions.php on line 271

The code in the area is:

function qa_widget_show_sub_cats( $cat_args, $instance ) {

global $post;

if ( is_qa_page() ) {

$cats = get_the_terms( $post->ID, ‘question_category’ );

foreach ( $cats as $category ) {

if ( $category->term_id ) {

$termchildren = get_term_children( $category->term_id, ‘question_category’ );

if ( $termchildren && !empty( $termchildren ) && !is_object( $termchildren ) ) {

$cat_args = $category->term_id;

break;

}

}

}

}

return $cat_args;

}

Please help me solve it asap.

Thanks a lot.