Fatal error: Uncaught Error: Call to undefined function is_multisite() in /home/customer/www/staging4.demo.flothemes.com/public_html/rev/delete_rev.php:67 Stack trace: #0 /home/customer/www/staging4.demo.flothemes.com/public_html/rev/delete_rev.php(19): get_blog_list_full(0, 'all') #1 {main} thrown in /home/customer/www/staging4.demo.flothemes.com/public_html/rev/delete_rev.php on line 67