[Resolved] Lightbox not working
I’ve just installed the Responsive plugin on my site, but it doesn’t appear to be working. The General Settings page is displaying the following message:
Warning: call_user_func() [function.call-user-func]: First argument is expected to be a valid callback in /home/wmpc/public_html/wp-admin/includes/template.php on line 1119
Do you have any ideas what could be causing the issue?
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