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I am having issues with reppics.com/blog. I tried to update my theme but am now receiving an error: Fatal error: Call to undefined function is_customize_preview() in /nfs/www/WWW_pages/reppics/reppics.com/blog/wp-content/themes/twentyfourteen/inc/widgets.php on line 40
I’ve checked and I have the latest version of WordPress installed. How do I resolve this fatal error?
Thank you