Warning: include_once(/htdocs/wp-admin/includes/plugin.php): failed to open stream: No such file or directory in /htdocs/wp-content/plugins/ml-slider/admin/lib/helpers.php on line 12

Warning: include_once(): Failed opening '/htdocs/wp-admin/includes/plugin.php' for inclusion (include_path='.:/usr/share/php') in /htdocs/wp-content/plugins/ml-slider/admin/lib/helpers.php on line 12

Fatal error: Uncaught Error: Call to undefined function get_plugins() in /htdocs/wp-content/plugins/ml-slider/admin/lib/helpers.php:13 Stack trace: #0 /htdocs/wp-content/plugins/ml-slider/admin/lib/helpers.php(25): metaslider_plugin_is_installed('ml-slider-pro') #1 /htdocs/wp-content/plugins/ml-slider/admin/Notices.php(40): metaslider_pro_is_installed() #2 /htdocs/wp-content/plugins/ml-slider/admin/Pages.php(29): MetaSlider_Notices->__construct(Object(MetaSliderPlugin)) #3 /htdocs/wp-content/plugins/ml-slider/ml-slider.php(74): MetaSlider_Admin_Pages->__construct(Object(MetaSliderPlugin)) #4 /htdocs/wp-content/plugins/ml-slider/ml-slider.php(59): MetaSliderPlugin->__construct() #5 /htdocs/wp-includes/class-wp-hook.php(286): MetaSliderPlugin::init('') #6 /htdocs/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #7 /htdocs/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #8 /htdocs/wp-settings.php(327): do_action('plugins_loaded') #9 /htdocs/wp-config.php(90): require_once('/htdocs/wp-sett...') # in /htdocs/wp-content/plugins/ml-slider/admin/lib/helpers.php on line 13