Fatal error: Uncaught Error: Call to undefined function Nextend\Framework\Platform\WordPress\is_admin() in /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Framework/Platform/WordPress/PlatformWordPress.php:19 Stack trace: #0 /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Framework/Platform/Platform.php(19): Nextend\Framework\Platform\WordPress\PlatformWordPress->__construct() #1 /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Framework/Pattern/SingletonTrait.php(12): Nextend\Framework\Platform\Platform->__construct() #2 /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Framework/Platform/Platform.php(89): Nextend\Framework\Platform\Platform::getInstance() #3 /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Autoloader.php(194): require('/home/legarden/...') #4 /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Autoloader.php(175): Nextend\Autoloader->requireFile('/home/legarden/...') #5 /home/legarden/www/app/plugins/nextend-sm in /home/legarden/www/app/plugins/nextend-smart-slider3-pro/Nextend/Framework/Platform/WordPress/PlatformWordPress.php on line 19