I get this message when I try to create a gallery - small pictures appear but the will not show big? Catchable fatal error: Object of class WP_Error could not be converted to string in /home/httpd/vhosts/idenfors.se/httpdocs/wp-content/themes/colorwaytheme/functions/inkthemes-functions.php on line 121
I had this problem and it is a simple setting: on the gallery settings on the right it give two choices: link to media file, and link to attachment page. If you link to media file, a larger picture will open in a new window
Please follow process as shown in link given below http://www.inkthemes.com/community/threads/gallery-page-with-wordpress-3-5.1118/#post-3992
