PLEASE HELP ME!!! New to this

I’m a actor and I was trying to upload my Resume and my “Resume” page that I created, it was working fine before but then out of no where it just stopped showing up and now whenever I try to upload anything it just says

Catchable fatal error: Object of class WP_Error could not be converted to string in /home/johnking/public_html/wp-content/themes/responsive/includes/functions.php on line 388

Listen I’m new to this whole website creating thing so I don’t know what went wrong, can someone please help me with this problem.