Child Theme Create Link

On my home page http://esilmarketing.com I have created a link to download a .pdf file however I get an error when I click on the link

Catchable fatal error: Object of class WP_Error could not be converted to string in /home/steve/public_html/wp-content/themes/utility/functions.php on line 272

I have read the info on functions.php in child themes but am not knowledgable enough to know what to do to fix it.

I created a functions.php file for the child theme with just the opening and closing tags as instructed but I don’t know how to fix this link issue.

Would appreciate any help. Thanks!