It is an error in the template. Go into the code and replace:
<?php printf( esc_attr__( ‘<cite class=”fn”>%s</cite> on’,’bizgrowth’, get_comment_author_link() )); ?>
with:
<?php printf( “<cite class=’fn’>” . esc_attr__( ‘%s’,’bizgrowth’) . “</cite> on”, get_comment_author_link() ); ?>